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Save energy to protect our Globe

How to design the LED light for saving more energy

15:07, 14/10/2013 .. 0 comments .. Link

The LED lighting is famous for energy saving, environmental protection , but because of the constant current, the energy consumption is also relatively increases, so the goal of how to  design lighting system is low power consumption. Constant current driver mentioned within 2V voltage drop , which consider the design of low-power , if the system ‘s voltage of the power supply and series light emitting diode exceeds 2V, the power voltage converter need to be considered in order to achieve low power consumption, but still maintain a constant current mode . a low-power Voltage converter is working in the form of switching, how to control the feedback circuit depends on the period of the switching to stably output the voltage. However, the output current is to control the converter switching cycle of the feedback circuit to maintain a constant current working state of the light emitting diode ,.

LED flood lamp

T6322 is a step-down constant current LED driver , the current decision in accordance with an external resistor , which can support up to 1.5A output current, providing ± 5% accuracy current and high power efficiency ( energy consumption ) , and the adjustment capability of high power transmission line.

In the current LED lighting products flooding the market , there are two categories of the power input system: one is control module backend for the front end of the AC input system coupled with constant current, such products include the frozen cabinet lights , indoor lighting , street lamps, table lamp , MR16, AR111 , etc. The other is AC / DC converter for directly inputting AC power system to integrate and the constant current circuit, including E27 and GU10 bulb-type LED lights , PAR lamps , T5 and T8 LED tubs and LED flood lamp and so on.

In addition the constant-voltage power supply of the front-end having better efficiency should be selected to design the first category , the power module the back-end constant power supply control uses the better power supply to be designed according to their efficiency of product features. The advantages lies in the front-end AC / DC power supply , such as switching power supplies, DC adapter, etc. constant voltage power supply, highly optional and more than a safety certification program , thereby reducing the design threshold.

Second power supply design due to the integration of the AC / DC circuit and the constant current circuit , the mechanism can be designed in accordance with a smaller space , but considering the power factor , power efficiency and safety, there are some difficult for the design . Therefore, very few of these products can achieve high luminous efficiency in the market now, high power factor ( > 0.9 ) standards.

In short£¬the primary consideration is the power module design to achieve high luminous efficiency and become the next major source for the current LED lighting products, different lighting products must select the correct design architecture . In addition, the power supply control IC must also improve the power efficiency, power factor , reliability, to develop products for LED lighting.

Nowadays£¬the LED flood lamp is the most widely used as the representatives of the decorative lighting and the outdoor lighting in daily life£¬the  LED flood lamp is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness needs to illuminate and decorate ,Meanwhile£¬there are a large number of factory engaging in developing and producing the   LED flood lamp£¬Lead Lighting is just one of them£¬which adopts highly integrated and high brightness COB as the light source of the  LED flood lamp so that fully guaranteed stable and soft light  and octahedron breadth and bright irradiation range of the  LED flood lamp, while low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the  LED flood lamp and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is Known as energy-saving and environmental protection. Browsing http://www.lead-lighting.com  to know more awesome and affordable LED flood light and other LED lighting.

Article from http://www.lighting-ledlight.com/index.php/how-to-design-the-led-flood-light-for-saving-more-energy/



What¡¯s the advantages of the LED light especially the PIR LED Flood Light

15:07, 14/10/2013 .. 0 comments .. Link

LED lamps have the nine advantages by comparison with the traditional lighting:

PIR  LED flood light

1 , high luminous efficiency  the luminous efficiency of fluorescent is about 55 ~ 80lm / W, while the LED luminous efficiency is 100lm / W or more especially the high power LED light such as the PIR LED Flood Light , and which will continue to improve as the technology continues to mature£¬half of the power LED lights can achieve the same luminosity of the fluorescent.

2 , high efficiency  the efficiency of fixtures mainly refers to the effective optical efficiency , the fluorescent emit light in all direction , while the light emitted in the opposite direction is no avail , so by using a white lamp shade can put a considerable part of the reverse light reflected back. Therefore , the fluorescent lamp efficiency is only 70 %, while the LED is a 120 ° light, all the light is almost the effective light particularly for high power outdoor PIR LED Flood Light , and the light angle may also need to be adjusted.

3 , high power efficiency case : 36W T8 fluorescent lamps, it’s rated output power is 36W, after accessing the ballast , the measured input power is 42.4W, which is that the core inductance lost 6.4W and 85% of Efficiency declined, most of the power of the iron-core inductor is more than 10W , the power factor is less than 0.5 , and the efficiency of LED power supply is usually up to 30% , a 18W LED tube only need 20W input power, the power factor can reach more than 0.9 .

4 , long life  the life of a high quality LED lamp up to 50,000 hours£¬ the advantage of life span of the high power PIR LED flood light used for outdoor light and decorative light is more distinct, the fluorescent lifetime is usually only 5000 hours , the difference is nearly 10 times.

5 , no mercury, no pollution  LED lights contain less harmful substances, which is a non- mercury pollution-free green light.

6 , the color temperature can provide almost any of a wide range of color temperature , and can provide the red , green, and blue colors of light as well as any kind .

7 , high CRI  the CRI of fluorescent is 65 ~ 80, LED lights especially the PIR  LED flood light can be > 80 , and no UV radiation.

8 , non- glass unbreakable , resist the impact, vibration.

9 , safety  the power supply of the LED  light is external isolating power , only less than 36V DC is safe voltage , which reduce the risk of electric shock and is a relatively safe lamp.

Browsing http://www.lead-lighting.com for more inexpensive and prettier PIR  LED flood light and other LED lighting.

Resource from http://www.lighting-ledlight.com/index.php/whats-the-advantages-of-the-led-light-especially-the-pir-led-flood-light/



About Litek ¡± tailored ¡± LED lighting just to keep the classic look in Venice

15:01, 14/10/2013 .. 0 comments .. Link

Venice, Italy , is a historical and cultural city , its changes is not necessarily popular, especially if it changes its iconic look and the sense of familiarity it brings, the Commission for the Architectural and Landscape Heritage insisted ensure new lighting match the old lighting. But the city is the same as many cities, which needs to reduce ethe nergy consumption of nighttime lighting and produced to guide project this resort reconstruction Litek spent four years testing. Currently , Litek have used LEDs particularly the Color Changing Outdoor Led Flood Light to transform the existing 7,000 lamps and decorate the city, the nergy-saving is 81.4%.

On the aesthetic and ambience , the Venice lighting is especially important , pedestrians stroll along the canal in the square and enjoy the unique architecture . For example , the famous Basilicadi San Marco is the heart of the project . “In the evening or at night , the perception a man on the marked building structures will be strongly influenced by light on the square , including Basilicadi San Marco, Torredell’ Orologio, Palazzo Ducale, ” Philips Lumileds marketing director MarkvandenBerg representation . ” For this reason, when is replaced by energy efficient LED lamps such as the Color Changing Outdoor Led Flood Light, keeping the accurate light quality the mercury discharge lamp provided is necessary .”

Color Changing Outdoor Led Flood Light in Venice

With the help of the LED lighting especially the Color Changing Outdoor Led Flood Light£¬Litek ” tailored ” Venice lighting , just to keep the classic look

After extensive testing , Litek use optical LuxeonK LED array Lumileds’ custom- designed and the solid-state lighting (SSL) module to replace the mercury discharge lamp . This transformation includes the 6000 pole mounting lighting devices. The color temperature of optional LED such as the Color Changing Outdoor Led Flood Light is 3000K, CRI is 80 , which matches the previous lighting while eliminating the maintenance problems and save energy. Litek thought the lighting will last 50,000 hours , the equivalent of night lighting for 11 hours, about using for 12 years.

The project also includes along the Grand Canal across the Accademia bridge and auxiliary lighting in the Rialto shopping district. According to local utility records , the annual power consumption is reduced by 75 kilowatts. As shown above , although the introduction of new technologies especially theColor Changing Outdoor Led Flood Light and other LED lighting, Piazza San Marcos still retains its classic look.

Browsing http://www.lead-lighting.com for more inexpensive and prettier   LED flood light and other LED lighting.

Resource from http://www.lighting-ledlight.com/index.php/litek-tailored-led-lighting-just-to-keep-the-classic-look-in-venice/



How to control the stability of brightness of the LED light

14:58, 14/10/2013 .. 0 comments .. Link

The brightness of the light-emitting diode varies with the current size and the  curves of voltage and current  of manufactured light-emitting diode is slightly different , and therefore the brightness of LED lighting often can not be stable with changes in the supply voltage. In order to maintain the consistent brightness , which needs to be achieved by the LED constant current driver . the constant current driver can make the light emitting diode operating at a fixed current mode, and thus the brightness is stability. The constant current driver also allows LED to long-term work at a certain current to keep them longer life.

RGB LED flood light

T6316 is a constant current driver , which is a light emitting diode drive current set the four-channel , the output current can be determined in accordance with the external resistor . T6316 has a current accuracy ± 6% and ± 3% matching accuracy between channels£¬which can be used for street lighting, tubs and other lighting equipment . Energy-saving considerations, the constant voltage between 0.5V ~ 2V across the drive must be considered for system design. Since the light emitting diode  work at a constant current for long time, the voltage across decreases slightly , this change should also be considered in the system design.

Nowadays£¬the RGB LED flood light is the most widely used as the representatives of the decorative lighting and the outdoor lighting in daily life£¬the RGB LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness and adjustable colour needs to illuminate and decorate ,Meanwhile£¬there are a large number of factory engaging in developing and producing the  RGB LED light£¬Lead Lighting is just one of them£¬which adopts highly integrated and high brightness COB as the light source of the RGB LED flood light so that fully guaranteed stable and soft light  and octahedron breadth and bright irradiation range of the RGB LED flood light, while low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the RGB LED flood light and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is Known as energy-saving and environmental protection. Browsing http://www.lead-lighting.com  to know more awesome and affordable LED flood light and other LED lighting.

Resource from http://www.lighting-ledlight.com/index.php/how-to-control-the-stability-of-brightness-of-the-led-light/



What¡¯s the working principle and characteristics of LED light source

14:41, 14/10/2013 .. 0 comments .. Link

Since 2010 , Europe, America , Japan and other developed countries have begun to execute the decree to ban incandescent bulbs , the decree was based on originally restricting the low luminous efficiency light sources. Incandescent bulbs are disabled and replaced by a light source including energy saving bulbs, cold cathode tube, LED and so on. But then considering the restrictions on hazardous substances in future , LED lighting will be the best choice.

COB-led-flood-light

Light-emitting diode is a diode the semiconductor material synthesis , composed by the PN interface , when the forward voltage is applied , the electrons combining with the holes release the energy in the form of photons , it has a light-emitting properties. And its source is produced near the PN interface, the emission wavelength depends on the material characteristics and has different light color, commonly red, yellow , green and blue light emitting diodes. The brightness of light emitting diode can be adjusted through the size of operating voltage ( current). At a large operating current range, the brightness of the light emitting diode increases with the current increase .

Nowadays£¬the COB LED flood light  is the most widely used as the representatives of the decorative lighting and the outdoor lighting in daily life£¬the COB LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness is needed to illuminate,Meanwhile£¬there are a large number of factory engaging in developing and producing the  COB  LED light£¬Lead Lighting is just one of them£¬which adopts highly integrated and high brightness COB as the light source of the COB LED flood light so that fully guaranteed stable and soft light  and octahedron breadth and brightness irradiation range of the COB LED flood light, while low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the COB LED flood light and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is Known as energy-saving and environmental protection. Browsing http://www.lead-lighting.com  to know more awesome and affordable LED flood light and other LED lighting.

Article from http://www.lighting-ledlight.com/index.php/whats-the-working-principle-and-characteristics-of-led-light-source/



What¡¯s the difference between the Isolated and Non-Isolated power of the LED tube

12:03, 12/10/2013 .. 0 comments .. Link

The core of LED tube is super bright white LED as light source , the shell is acrylic / aluminum alloy ( customer-defined ) . Housing can be made of PC pipe, the durable temperature of the LED tube is 135 degrees. The caliber of the LED tube light is the same as the traditional fluorescent lamp in the dimensions, the length is generally 60cm and 120cm, 150cm, the power is generally 10W, 16W and 20W, and the power consumption of 20W traditional fluorescent lamp ( ballast ) is actually about 53W , the actual power consumption of 40W traditional fluorescent lamp ( ballast ) is about 68W.

Currently, almost all led tube light on the market are based on built-in power supply . the so-called built-in refers to that the power supply can be placed inside the tube. The biggest advantage of this built -in is that the existing fluorescent tubes can be directly made for replacement without having to make any changes to the original circuit . Therefore, the shape of the built -in power usually is made into the strip in order to be put into the semi-circular tubes . There are two built-in power , one is non -isolated ( Figure 1 ) , the other is isolated ( Figure 2 ) .

Non-Isolated LED power supply

Non-Isolated refers the direct connection between the led 220V input terminal and the load, so there is risk of electric shock touching the load . only the aluminum plate which is the thin insulating layer of isolation between 220V and the aluminum is usually not easy to pass CE and UL certification.

Isolated LED power

Isolated refers to the isolation transformer between the input and output£¬the transformer may be the power frequency or may be high frequency£¬but both of which can isolate the input and output. Avoid the risk of electric shock . It is easy to pass CE or UL certification.

First, the power consumption of the built-in LED tube light

The biggest advantage with the built -in power is that y the existing fluorescent tubes can be directly made for replacement without having to make any changes to the original wiring. So this kind of built-in advantage is not also pay a certain price ? Indeed, and this consideration is not small£¬which should be talking about from the ballast of the ordinary fluorescent lamp:

Schematic of the fluorescent Power Supply

We know that the most common starter of a fluorescent lamp is the use of a series inductor shunt core and a starter ( Figure 3a). For this circuit directly replaced by a LED tube light, just unplug the starter. However, due to iron-core inductor still serried in the circuit , so it still brings nearly 6.4W (Philip) to 10W ( domestic ) loss , resulting in that this part of the additional losses greatly reduce the LED power-saving effect. For example , originally a 20W LED tube can replace a 36W fluorescent lamp , take a built-in non-isolated 20W LED tube light for example, the measured results are as follows .

In other words, the result is that a direct replacement for efficiency is significantly reduced, the efficiency of the domestic magnetic ballast is only 56.2% . Only saving more 6.8W than normal fluorescent lamp

This makes the performance of the power-saving LED tube light greatly reduce, resulting in that the energy management contract (EMC) is difficult to enforce .

Two , heat and life

Another biggest drawback of built-in power is the low life . Because the power supply must be placed in the tubes , so that the tubes can not be made into the fin, but only an ordinary semi-cylindrical , at most, some very shallow strip grooves is added on the surface ( Figure 4 )

The surface area of this semi- cylindrical : 2πR * h / 2 = πR * h. For the T8 tube , its diameter is 26mm, so the radius is 13mm. a surface area of a 1.2 m T8 tube ​​: π * 1.3 +120 = 490cm2, we know that the surface area of ​​heat sink of LED generally requires 60cm2 / W. Therefore, only the semi- tubes dispose the heat of 8W . The input power of T8 LED fluorescent lamp is usually 20W, assumed that LED luminous efficiency is only 20% , then there are 16W of input power into heat . And now only disperse heat 8W , while 8W calories still can not be trapped , the result make the LED junction temperature rise, shortened life expectancy.

Moreover, because the power supply is built , the power of the heat is also added to the tube , assuming the efficiency of the power supply is 88% , so there should be dispersed 2.4W calories , equivalent to 30 percent while increasing the heat , that there is a total of 10.4W power can not be distributed£¬making the LED heat added to a difficult , or that making that the LED ‘s life is also more shortened. Moreover , the length of power supply is about one-fifth of the lamp , of which the heat the power supply issue is concentrated in this period, so the LED close to the power is baked by hotter heat , and thus the life of the LED is shorter than elsewhere, if the tube is damaged , where close to the power is firstly black . What can be considered that the life of built-in power LED tube light is not more than 10,000 hours.

And put the tube inside the power , the power have to withstand the high ambient temperature generated by the LED itself, but also , which greatly reduces the power of the life of electrolytic capacitors , thus reducing the lamp life .

Third, the cost

Because the life of built-in power LED tube light is only 10,000 hours and 50,000 hours compared to the external power supply , the cost is apparently five times higher. What’s more, whether it is damage to the LED , or power supply is damaged, usually both have to be discarded . but for the external power of the LED tube light ,we can freely dispose the damaged part.

In addition , the built -in power supply has also increased the disposal and recycling costs of the electronic waste . Because the power section must be ripped to treat separately.

External power supply not only have high efficiency, long life, but also can increase the manual dimming or automatic dimming and other special features , which are built-in unmatched !

From the above we can conclude that the disadvantages and problems of the introduction of  built-in are very serious , unfortunately, some people just covet it may be 10% cheaper, regardless of its cost that is five times higher . Turns out to be big for the small loss , more harm than good !Visting http://www.lead-lighting.com for more awesome and affordable LED tube or other LED lighting.

Article from http://www.lighting-ledlight.com/index.php/whats-the-difference-between-the-isolated-and-non-isolated-power-of-the-led-tube-light/



Full sense of science and technology: The world¡¯s first solar panel LED sidewalk

12:01, 12/10/2013 .. 0 comments .. Link

Recently, several students from the United States, George Washington University laid the world’s first solar-powered LED sidewalks in schools, all solar panels have to undergo a certain treatment for aesthetic and practical, a layer of translucent non-slip layers was attached on the surface, looking technological sense.

LED sidewalks

The sidewalk is able to produce a peak 400 watts of electricity each day for 450 LED lighting use under solar panels, some excess capacity is “recycled” into the school innovation hall. Hope that with the popularity of this facility, our reinforced concrete cities will be more energy efficient and environmentally friendly.

There is no doubt that LED combined with the electronic and solar offer us the significant convince ,especially LED lighting as the third generation of the lighting based on the semiconductors isn’t limited to simple lighting any more, it is closely related to the design, agriculture, medicine, science and technology and other industry to show us pretty visual experience and convenience now  .

Nowadays£¬the LED flood light such as the  rechargeable portable LED flood light 30W and LED tube light are the most widely used as the representatives of the decorative lighting and the home lighting in daily life£¬the LED tube light enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments everywhere, the LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness is needed to illuminate,meanwhile£¬there a large number of factory engaging in developing and producing the LED light£¬Lead Lighting is just one of them£¬which adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light so that fully guaranteed stable and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the LED tube light and LED flood light and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is Known as energy-saving and environmental protection. Browsing http://www.lead-lighting.com  to know more awesome LED flood lights and other LED lighting.

Resource from http://www.lighting-ledlight.com/index.php/full-sense-of-science-and-technology-the-worlds-first-solar-panel-led-sidewalk/



How to improve the LED lights

11:58, 12/10/2013 .. 0 comments .. Link

Many people believe that the LED retrofit lamps are currently the fastest growing LED lighting market. The rapid growth of reason is simple: These lamps do not require electrical infrastructure ( ie, wires , transformers, dimmers and outlet ) , which is a significant advantage of LED technology .

For the designers , there are two main challenges for the LED lights installed into the existing infrastructure:

led-tunnel-light

1 dimensions.

Retrofit lamps must can be mounted to the frame of previous light source.

2 Electrical compatible . Retrofit lamps must work in the existing electrical infrastructure, without light flicker .

Next, we shall discuss each challenge.

Installed into the existing framework  the existing framework offer the ​​physical limitations ( ie drive plate must be small enough ) and thermal limits for the retrofit lamps . These factors restrict the conditions that the designers replace the lamp ( eg PAR, R and A-type specification ) , the smaller the size of the application£¬ the greater the difficulties face, for example, MR16 and GU10.

Size is a key factor in restricting replacement program , and thermal limitations are often more critical. LED only emits visible light , unlike other technologies, they do not produce infrared radiant energy waves . Therefore, the energy-efficient of the white LED such as the LED flood light and the LED tunnel light is higher than the incandescent or halogen , the vast majority of the heat is dissipated by the conductor inner the lamp .

Heat is the key factor restricting the intensity generated by the light£¬LED technology is currently difficult to reach the brightness the mainstream market accept in the replacement lamps, the heat problem urgently need to be solved in order to break the brightness limit , which is the indispensable condition the LED products successfully commercialize .

Thermal problems but also directly affect the life of the drive plate .the  lights especially the LED tunnel light must operate at very long time and high temperatures (+80 ° C to +100 ° C)in order to emit more light and keep the safety of the vehicle. Under this temperature , the drive will limit the life of the work of the entire board lights, especially the electrolytic capacitors become a thorny issue the design face. Because the electrolytic capacitors dry quickly at high temperatures , the life of the capacitor does not exceed several thousand hours in such conditions,  which becomes the limiting factor in the life of the LED tunnel light and other high-power LED light . Longer working life is one of the main selling points of LED tunnel lights and other LED lights , for the designers, the electrolytic capacitors that is of relatively short life become a major barrier design .Just browsing http://www.lead-lighting.com for more information about the LED tunnel light and other outdoor and indoor LED lights.

Resource from http://www.lighting-ledlight.com/index.php/how-to-improve-the-led-lights/



What¡¯s the characters of the LED light

11:57, 12/10/2013 .. 0 comments .. Link

The basic structure of LED lights is an electroluminescent semiconductor materials, which is placed on a wire rack and sealed with epoxy resin around so that protect the internal core lines , so the LED ‘s seismic performance is good. LED is a rapidly developing technology and widely used for many general lighting applications , it is commonly referred to as solid-state lighting. Typical applications of LED lighting : indoor lighting ( for commercial , industrial and residential environment ) such as the LED tube and LED ceiling light¡¢LED panel light , outdoor lighting ( street lighting, parking lot lighting ) and architectural , decorative lighting particularly the LED flood light and the LED street light, etc. Initially, the light-emitting diodes capable of emitting the entire spectrum of color is used in decorative lighting.

led-ceiling-light-02

In some cases , LED especially LED flood light has become an effective program of the architectural lighting . Compared to other lighting technologies , LED has superior performance , and thus become the mainstream scenarios of the current general lighting market:

1 Compared to other lighting technologies , LED has a longer life . LED operating life is up to 50,000 hours, while the life of incandescent is only 1,000 to 2,000 hours, the life span of the compact fluorescent lamps (CFL) is about 5,000 to 10,000 hours. A significant advantage on the life of the LED is ideal for those who need the labor cost to replace the lighting of commercial and industrial applications.

2. energy efficiency is better than the incandescent and halogen lamps, fluorescent equivalent . In addition , LED’s efficiency is improving ; white LED (WLED) efficiency such as the LED ceiling light and LED tube and other indoor LED light is expected to increase about 50% next 3-4 years.

3. smaller dimensions . Dimensions of the LED lights is equivalent to MR16 and GU10, while CFL is unable to meet such applications .

4.the appropriate drive can be used to provide brightness adjustment .for the application needing to adjust the brightness, the fluorescent has technically limitations. While traditional LED design also encountered a similar problem, but the innovative solutions for the drivers of the LED ceiling light and LED panel light compatible with triac dimming and dimming rear edge.

5. a strong directional light . Different from other lighting technology , LED is ideal for directional lighting applications , such as : small-angle reflector lamps .

6. a higher efficiency at lower temperatures . Efficiency of the fluorescent lamp will fall at a low temperature. In contrast , LED is ideal for low temperature environments, such as : refrigerator light .

7. the light color can be easily changed . This advantage makes RGB LED become the ideal choice of the architectural and mood lighting , which can real-time changes light color according to the specific requirements.

In short , LED light especially the indoor decorative LED lighting such as the LED ceiling light is known as many advantages the incandescent and fluorescent lamps do not have . Based on these advantages , designers continue to find more applications for LED lighting , but because of space limitations, we will not repeat them here.

Browsing http://www.lead-lighting.com for prettier and inexpensive indoor decorative LED ceiling light and LED tube or high high-power LED flood light and other LED lighting.

Article from http://www.lighting-ledlight.com/index.php/whats-the-characters-of-the-led-light/



What¡¯s the advantages and shortcomings of the high-power LED light such as the LED flood light

11:55, 12/10/2013 .. 0 comments .. Link

High power LED is the most important means of achieving the flux . High-power LED lighting such as the LED flood light and LED street light and LED tunnel light has many advantages , there are also disadvantages. How to make good use of high-power LED is the key, while high-power LED lighting products and traditional lighting products were compared , but also high- lumen LED lighting has been discussed in the field of application.

One , LED’s history and potential applications  since LED was born£¬the brightness has increased by 30 -fold every 10 years , 10-fold lower prices “Haitz” law rapidly develop. Ordinary high-brightness white led has currently reached 100lm / W in the laboratory, 50lm / W high power white LED has entered the commercial. In monochromatic light , the red, yellow , blue, green light efficiency is being constantly refreshed recording , LED as a new light source increasingly wide range of applications , has gradually attracted more attention and expectations.

LED application is diversified distribution in various industries now, including instructions , display, backlight , the lighting and so on. lighting is the most promising industry in many applications of LED , along with the LED luminous efficiency continues to improve and the costs constantly decrease , the entire lighting market LED occupies will be growing . Following the United States, ” the next generation of lighting plan ,” Japan ‘s “21st Century Lighting Plan ” , the EU’s ” Rainbow Plan ” and South Korea’s ” solid-state lighting plan” , China’s establishment of the National Semiconductor Lighting Project Team aimed at integration of resources in 2003, fast forwarding LED lighting to enter market . According to the Chinese Academy of Engineering academician Liang-Hui Chen predicted that China the semiconductor lighting energy can be accumulated 400 billion kWh of electricity in 2005 ~ 2015,  saving users 260 billion yuan in electricity charges , creating 150 billion yuan output value , solving one million population in employment .

led-flood-light

By then, the semiconductor lighting energy savings will exceed “Big Mac” – the annual generating capacity of the Three Gorges Power Station ! In the context of the growing shortage of energy , the use of LED energy-saving features , the development of LED lighting is a positive response for the government ‘s construction of a conservation -oriented society.

Second, the high-power LED light source especially the LED flood light and LED street light and LED tunnel light that is called ” green light ” deserved by comparison with other LED. In the lighting industry, the comparative analysis with traditional light sources , certain show the irreplaceable advantages: LED as a light source has the following advantages for illumination:

1 , low power consumption : the power consumption of LED flood light and LED street light and LED tunnel light and other high-power LED light that is of 75lm / W luminous efficiency reduce by about 80% than incandescent of the equivalent brightness ;

2 , long life: the life span of LED flood light and LED street light and LED tunnel light and other high-power LED light is up to 50,000 hours , 24 hours of continuous light can be used for seven years ;

3, the brightness and color of the dynamic control is easy : achieve continuously adjustable brightness , high color purity , enables dynamic color transform and digital control ;

4 , Dimension flexible : organic integration of the construction,  only light but not lamp ;

5, environmental protection : no toxic metals mercury, no infrared and ultraviolet radiation ;

6 , color : bright and saturated, pure , no needing lens£¬red, green and blue color elements into a variety of different colors, can be realized changing, gradually changing, color mixing, excellent Color Rendering. Set so many advantages in one, made ​​us feel that vigorously promote the use of LED is a valuable work .

But the LED light source surely has shortcomings compared with other aspects , such the color rendering of the white light illumination particularly LED flood light and LED street light and LED tunnel light and other high-power LED light is low. Currently the color rendering index of the light of white LED by using yellow and blue phosphors produce is about 80 .which  can be used as a general lighting, but becomes inadequate for some sites that require high color resolution. Although by adding an the appropriate red phosphor can make the color rendering index increased to 90 or higher , but there are still some gaps compared with incandescent lamps 99 , and its efficiency is affected. Through RGB color mixing process can also improve color rendering, but we need to do more on the application of technology in the universal, so in terms of color , LED also needs to be improved. As for the price is too high, One-time investment is larger , in fact, from a comprehensive cost considerations, t Large area power consumption, it is the wise and better choice to use the high-power LED flood light and LED street light and LED tunnel light in the open air where more lighting fixtures and those having highly performance on waterproof, dustproof outdoor are required. Browsing http://www.lead-lighting.com for more affordable and awesome high-power LED flood light and LED street light or LED tunnel light and  other LED lighting

Article from http://www.lighting-ledlight.com/index.php/whats-the-advantages-and-shortcomings-of-the-high-power-led-light-such-as-the-led-flood-light/



How to choose LED bulbs or LED tub light

11:51, 12/10/2013 .. 0 comments .. Link

An 7W LED bulb or LED tube is equivalent to a 60W incandescent light , and the energy saving is more than 35% , the service life span is more than 5 years , it can quickly switch 30000 times , eliminating the need for frequent replacement. As we respect green and energy saving life, the LED bulbs or LED tube light known as bright and long lifetime become the preferable lighting more and more common household choose. However, facing with a wide variety of LED bulbs products, how to choose the qualify LED bulbs or LED tubs?

How to fix the LED tube

The first one: carefully inspect the Product packaging

For the regular LED bulb or LED tubes, there must be parameter index £¬manufacturer , origin , contact information and logo on the product packaging,. Through the product packaging, we can firstly understand the brightness, light color , energy efficiency and service life which are factors we are concerned about to correctly choose our own products. If these logo do not on the product packaging , which are the non-formal product, the product quality is difficult to be assured£¬it is difficult to find businesses for after-sales service consumers if the LED bulb or LED tube is damaged. Therefore, we should carefully read the product packaging before in the purchase of LED bulbs or LED tube light.

The second measure : Pick up the bulb to carefully observed

After reading the product packaging of LED bulb or LED tube light , next we should take out the light to touch , shake, quiz . First, take a look at the appearance of the lamp , and its overall appearance should be smooth and evenly without scratches ; secondly ,  touch the surface of the lamp everywhere, the surface should be smooth, no obvious sting feeling ; forcedly shake bulbs once again, there should be no abnormal sound interior, if so , probably because its internal components are not fixed or debris in the lamps , which can easily cause a short circuit inside the lamp circuit so that damage the lamps ; Finally , requiring businesses lit LED bulbs in the relatively dark environment, observe its light color and brightness , as well as whether the stability of the light emitted by the lamp and the light color is uniform and the light is comfortable on the eyes .

The third measure: both safety and environmental protection

LED bulbs or LED tube light is an appliance , its security is a top priority . Therefore, we must choose the LED products receiving the national product quality certification, be sure to check product safety certification ( such as GB certification and CE certification , etc. ) , the safety, performance and quality of the products obtaining the safety certification can be guaranteed . These logos will generally appear on the product packaging or product brochures inside the box , we should carefully review in the selection of LED bulbs or LED tube light .

Green is an important factor must be considered when purchasing LED bulbs and LED tube light , there are no infrared , ultraviolet radiation, mercury and other material potential hazards of health qualified in LED bulbs and LED tube light, nor harm environmental after disposed. For us consumers more environmentally conscious, be careful the logo when buying products on the packaging.

Fourth trick :  comprehensively considered

Philips LED light source , Asia Pacific Product Marketing Manager Lujin Qing believes that every family ‘s space environment is not the same , consumers should choose appropriate LED bulbs or LED tube light according to the environment rather than the brighter the better , nor is the more expensive the better . In addition , the brightness desired in living room, kitchen , bedroom, bathroom and other different places is not the same , only the LED bulb and LED tube light appropriately mix the different brightness or color can create a cozy or bright and clean clear varied home lighting environment.

Surfing http://www.lead-lighting.com for more affordable and practical LED bulb or LED tube light

rticle from http://www.lighting-ledlight.com/index.php/how-to-choose-led-bulbs-or-led-tub-light/



iphone6 ​​broke the news: large-screen OLED may be used next year

02:13, 9/10/2013 .. 0 comments .. Link

Recently, South Korean ETnews reported all Apple device’s screen will be changed a lot in the coming year, Apple is rumored to be substantially improved iPhone, iPad and MacBook ‘s display£¬ which will not only increase the screen size, but produce a flexible screen . Take a look at a brief description of these changes :

OLED screen of the apple

iPhone will use more than 5 -inch display

iphone6 ​​or will use large-screen OLED next year

iPad will be divided into entry-level and high distribution according to the screen size . 12.9/13 inch model does exist

iPadmini will receive a high resolution display next year

OLED display will begin to integrate Apple products, including the Apple iWatch upcoming released

MacBook will use more energy-efficient LED display

In addition , the report said Apple will continue to use display from Japan, and will more rely on LG and Samsung screens.

Of course, some of these changes are very tricky , and some are not. Many rumors that Apple will release the iPhone that is of larger screen size in 2014, , but how much the screen size specifically is still unknown. There are reports that Apple is testing the 4.7 -inch and 6-inch display , as well as analysts pointed out that the iPhone’s screen size of the large screen is between 4.5-5 inches .

The iPad whose screen is Larger is also plausible rumors , Apple wants to attract more customers by changing the screen size . There are many reports that the iPad that is of the larger screen will use the 12-13 inch screen . which is pretty suitable for the schools, companies and other places and it may impact on the notebook market . But it seems that Apple does not distinguish the entry-level or high through the screen size . iPad may eventually will have 7.9 -inch , 9.7 -inch and 12.9 -inch three options , which is the same as the Apple notebooks that have different screen sizes.

All along , there are rumors that iPadmini will use the high-resolution Retina display. iPadmini2 screen resolution will reach 2048 * 1536 , which is the same as the third and fourth generation of full-size iPad . Recent reports said the supply will be very tight , maybe we could not see iPadmini2 with Retina screen this year.

For OLED display, many patents have shown that Apple is actively developing this technology. A recent analysis pointed that iPhone Retina display is equally impressive with that OLED display that is of low power consumption£¬ which is very useful for Apple iWatch smart watch being developed. On the other hand , Apple CEO TimCook said OlED can not achieve various advantages Apple’s current screen select.

Apple’s notebook is getting thinner and thinner , the performance is increasing . So Apple choosing to use less energy screen makes sense. The only drawback of the Retina display MacBookPro is equipped with is too much power , which is the main reason for MacBookAir not using the Retina display . For the screen supplier , Apple does not seem to increase the reliance on the Samsung . Anyway, we will see more changes in Apple products in 2014, not just the display area .

The current maximum 4-inch iPhone screen has long been criticized by users, if what will be a universal joy in the future that a larger iPhone screen can be used. This fact is likely to be confirmed on iPhone6 released in the next year.

Regardless of how improved screen of Apple products , I believe Apple will eventually adopt   OLED as their screens,OLED is the organic LED and also belongs to a class of the LED, with the fiery LED lighting applications£¬it has gained the growing recognition, but LED lighting is surely the main applications of the LED.

Nowadays£¬the LED flood light such as the rechargeable portable LED flood light 10W and LED tube light are the most widely used as the representatives of the decorative lighting  and the home lighting in daily life£¬the LED tube light enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments everywhere, the LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness is needed to illuminate,meanwhile£¬there a large number of factory engaging in developing and producing the LED light£¬Lead Lighting is just one of them£¬which adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED floodlight so that fully guaranteed stable and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while  low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the LED tube light and LED flood light and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is Known as energy-saving and environmental protection £¬log http://www.lead-lighting.com  to know more awesome LED floodlights and other LED lighting.

Resource from http://www.lighting-ledlight.com/index.php/iphone6-broke-the-news-large-screen-oled-may-be-used-next-year/



How to assembly the LED ceiling light

02:12, 9/10/2013 .. 0 comments .. Link

Tools / materials

Prepared materials:

3pcs LED light source

Two Circlips

A set of Light body shell

An aluminum plate

One Terminal line

Three Lens

Spare Paste

Two Screws

Spare soldering iron

LED ceiling light

Methods / steps

1.First use a soldering iron to weld light source of the LED ceiling light in the aluminum plate;

2. the re-lay thermal grease behind the aluminum plate of the LED ceiling light and then put it back the shell of the radiating;

3.Terminal line of the LED ceiling light through the bottom of the housing and then use the soldering to weld the terminal lines on the positive and negative of the aluminum plate;

4. fix the lens on the source of the LED ceiling light

5.Then put the cover and tighten the cover and lens;

6. tighten and assemble the outer ring

7. assemble the packed light body and shell together again;

8.Connect the drive£¬then the LED ceiling light can normally be used

Precautions

Electrical connection voltage is 220v£¬make sure power off and then received the voltage

When welding there mustn’t direct cold joint on the aluminum plate and lamp beads of the LED ceiling light, nor the cable and aluminum plate;

The impurities should not in the Lamp beads£¬otherwise affect the appearance;

The screws can not be screwed too tight in case of slide wire;

Don’t fall the LED ceiling light

Logining the http://www.lead-lighting.com for more information about the LED ceiling light and other LED lights

resource from http://www.lighting-ledlight.com/index.php/how-to-assembly-the-led-ceiling-light/



New energy-saving LED Tunnel lighting market broke out

02:09, 9/10/2013 .. 0 comments .. Link

With China’s highway construction advance from the eastern plains to the western mountains , the tunnel is widely used in construction , but the traditional tunnel lighting consumes huge energy, the use of new LED tunnel lighting to reduce energy consumption become the development trend of tunnel lighting . To this end, the Ministry of Transport to promote LED tunnel lighting system to achieve that the lights turn on and off as the car comes and leaves lights in Yunnan , Hebei, Guangxi and other highways, and having achieved significant energy savings.

Yunnan Bao Ma Daozai highway tunnel, a car is entering the tunnel , the vehicle detectors sensitively detect the car at 200 meters away from the tunnel entrance, the tunnel lighting PLC control system immediately open loop£¬the energy-saving LED tunnel light lamps lit up , the vehicle smoothly enter and exit the tunnel , after detecting the vehicle has left and finding no vehicles inside the tunnel£¬another tunnel turn off the lighting control system, avoiding unnecessary energy consumption. Experts said , LED tunnel lighting ahs achieved good energy saving effect , on the one hand due to the high luminous efficiency and low power consumption of the semiconductor light-emitting diode, the brightness of LED tunnel lighting is adjustable, wecan adjust light levels inside the tunnel to meet the lighting needs of drivers , which led the control technology of the tunnel lighting , the energy-saving effect is remarkable.

LED tunnel lighting

Yunnan Ma Daozai tunnel implemented the LED lighting technology , supply and distribution system active power filter technology and nighttime vehicle sensor lighting control systems, etc.. Project uses a total of 51.64 kilowatts 858 sets of LED tunnel lighting to replace the original 770 sets of 146.19 kilowatts of high-pressure sodium lighting, effectively reduce energy consumption ; Active filter device reduces equipment damage generated by the instability electricity of the power supply; enabling vehicle sensors lighting control systems at night both ensure the lighting requirements of the passage of the vehicles, but also reduce the void lighting without the vehicle passing, the integrated energy-saving rate is 66% compared with the original HPS program.

It is understood that the existing 1957 HPS have been replaced with LED tunnel lighting  in Qiuwo Liang tunnel , Yin ditch tunnel, Hejiagou tower ditch tunnel No. 2 tower ditch Tunnel in Hebei Chengde expressway , since the project was put into operation The average monthly saving is about 45,000 degrees , the annual saving is 540,000 degrees .

Currently, LED tunnel lighting and the control technology based on real-time traffic has been applied in Anhui Lv’an to Wuhan Expressway , Beijing-Taipei Expressway and Shanghai-Chengdu Expressway and many tunnels, which can save 40% to 80% electricity.

Browsing http://www.lead-lighting.com for learn more practical character and features about the LED tunnel light and other LED lighting.

Article from http://www.lighting-ledlight.com/index.php/new-energy-saving-led-tunnel-lighting-market-broke-out/



LED lighting equipped with the new driverless subway trains will enter London

02:08, 9/10/2013 .. 0 comments .. Link

The world ‘s oldest underground railway maybe introduce more spacious , more energy efficient driverless trains in London. New air-conditioning system will make British people without sweating in the summer when taking the subway in future in the coach . The new coach  will display in London Royal Victoria Dock on Tuesday 8th October 2013 .

This coach  is designed by the German electronics company Siemens , using the LED lights as the illumination , allegedly the energy efficient is three times more than the existing£¬the new coach will not separated by the compartment any more, the weight is two percent lighter, so that the space available increase three percent. The door of the new coach wider than at present , so without force crowded at rush hours .

New coach using LED lighting

LED lighting equipped with the new driverless subway trains will enter London

New coach using LED lighting.1

LED lighting equipped with the new driverless subway trains will enter London

New coach using LED lighting.2

LED lighting  equipped with the new driverless subway trains will enter London

Each coach  of the new trains cost more than $ 1,540,000 , Siemens means if the authorities decide to purchase , the train can be manufactured in the UK . However, due to the driverless operate of the new trains, making the minority of subway without a job at any time , the new trains are not expected to welcomed by the relevant trade unions .

The LED light applied to the subway lighting has not only been very popular in UK£¬ but also in the major city of China such as Guangzhou, Shenzhen, Beijing and other countries especially the USA¡¢Japan have also been actively promoting and replacing with the LED light  in the subway over the world.

Apparently, the LED light due to the low-carbon and environmental protection features have been attached great importance by the government departments and applied to the public device.Nowadays£¬the LED flood light and LED tube light are most widely used as the representatives of the public lighting in daily life£¬the LED tube light enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments everywhere, the LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where  the higher brightness lighting id needed to illuminate, Lead Lighting adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while the low voltage constant current driver of the LED flood light and LED tube convert the alternating current into the direct current so that   significantly improve the energy efficiency and the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection £¬login http://www.lead-lighting.com to know more awesome LED floodlights and other LED lighting.

Article from http://www.lighting-ledlight.com/index.php/led-lighting-equipped-with-the-new-driverless-subway-trains-will-enter-london/



Why do the LED light especially LED tube light improve myopia and lighting

02:06, 9/10/2013 .. 276 comments .. Link

The latest data show that the juvenile myopia is up to 80% in our nearly 400 million persons with myopia , Chinese myopia of the young students, children has been ranked second in the world . Experts believe that environmental factors is fairly close to the incidence of myopia , in which the classroom lighting is one of the most important factors . Yan Yonghong£¬Professor of College of Architecture and Urban Planning in Chongqing University and the Director of National Low Carbon Lighting Research architectural lighting, said the research proved that  spectra of the LED particularly the LED tube light is easier to meet safety requirements by comparison with the fluorescent lamps, LED has better visual effect performance in the same color temperature and under the same illumination, which is more conducive to student visual health and relieve students’ tension and improve learning efficiency. In the National Natural Science Foundation project ” research health illumination based on the biological effects of light in the classroom ” Professor Yan Yonghong is responsible for, the human’s mentality and physiological responses were tested and studied under different illumination, in which the light and learning efficiency and visual fatigue, mental fatigue experiments show that the value of the recognition curve of  the white color temperature that is about 4000 ° K light source is of best stability and the highest recognition rate . According to the briefing , LED lights especially LED tube light have a greater advantage over fluorescent , which has a very large market potential. Why the LED tube light has not yet formally entered the field of classroom lighting is because that the price of LED light is too high that our majority of us can’t accept, which forms a bottleneck to promote the LED light . Even if the public has learned about the environmentally friendly, energy-saving advantages of LED lights, but the price and quality issues make us stay away, leaving some potential consumers are lack of confidence on LED products .

LED tube light

Recently, the technical team of Shenzhen lead lighting has achieved revolutionary innovation in the electrical, optical, thermal , materials through years of continuous efforts and the integration of advanced technology advantages and solve the universal application puzzle of the LED lighting , greatly reducing the cost of LED products and marketing a highly cost-effective products such as the LED flood light£¬LED tube light £¬LED ceiling light and other pretty LED lighting, which has won wide public acclaim. Lead Lighting is one of the batch of high-tech enterprises first opening up LED lighting field£¬ and thus has a special feeling on the LED industry. At the beginning, the LED industry came step by step at home and abroad , with the growth , development, and it seems that the company is the industry ‘s eldest son , who shouldering more responsibility on the industry , we hope their hard work which are better than more of others in exchange for better and faster development of the domestic LED industry, the product of Lead lighting all through the authority of the department of qualified, certified by CE and ROHS and other certifications. Lead lighting whose website is http://www.lead-lighting.com has been considering the technological innovation as the driving force , painstaking research and development of new products are to specialize the affordable and qualify LED lighting to furthersatisfy the needs of our daily lighting   ,

Article from http://www.lighting-ledlight.com/index.php/why-do-the-led-light-especially-led-tube-light-improve-myopia-and-lighting/



How to design the LED tunnel lighting

13:41, 7/10/2013 .. 0 comments .. Link

The positive volt ampere characteristic of the LED is similar to the general diode£¬ the applied forward voltage slightly change, the forward current will produce great changes , resulting in that the internal loss and fever of the LED rapidly increase£¬which seriously affect the normal work and life of the LED. constant current power supply must generally be used for high power LED tunnel light to prevent this from happening. To maximize the efficiency of the current source and reduce the heat , the input voltage of the current source must be reasonably controlled so that the maximum value is the same with the current after being deducted the internal voltage and match the total voltage the LED tunnel lighting needs. Internal losses is small, the reliability of the current source can be guaranteed .

The tunnel lighting Generally requires a large number of fixtures , huge power is consumed£¬the driver of the LED tunnel lights also requires that its power factor and harmonics generated must meet the requirements of the relevant standards in order to save energy and reduce the grid “pollution “, with due consideration of electromagnetic interference and electromagnetic compatibility .

LED tunnel light

( 1 ) adopt the power that is of high conversion efficiency, high stability  the conversion efficiency is greater than 87% , the power factor is greater than 95% , the switching power supply (96 ~ 264V) that strongly against the external voltage fluctuations together with the constant current circuit design£¬driving the LED tunnel light source at constant current is to ensure the life of LED tunnel lighting.

( 2 ) using the control circuit which appropriate the tunnel lighting, regulating the power of the LED tunnel lighting at different tunnel segments and different time is to achieve good lighting effect and energy saving. The introduction of the tunnel inlet section , using different current to drive at the Adaptation stage, transitional stage and outlet sections and trying best to make it is close to the curve required of the tunnel lighting to achieve the best lighting effects ; adopting the timing adjustment function at tunnel inlet section and an outlet section£¬ by adjusting the output current PWM dimming or dual power supply , single supply at night , so that the power of the LED tunnel light is reduced to 50% of the daytime lighting , which are effective to reduce “light hole” and “black hole “phenomenon both during the day and night .

Browsing http://www.lead-lighting.com for more information about the LED tunnel lighting and other LED light

Resource from http://www.lighting-ledlight.com/index.php/how-to-design-the-led-tunnel-lighting/



How to detect the power supply of the LED flood light and other LED lights

13:40, 7/10/2013 .. 0 comments .. Link

1 , By observing the shape of the transformer is to check whether there are significant anomalies. If the coil wire is broken , Desoldering, there are burn marks or not for the insulation material, whether the core fastening screw of the LED flood light loose and the silicon steel rust and the windings expose and so on.

2, the insulation test . Use a multimeter R × 10k to respectively measure the core and primary of the LED flood light, primary and the secondary , core and the secondary, electrostatic shielding layer and panties secondary , secondary resistance value between the windings . Multimeter pointer refers to the infinity position which should not move , otherwise , indicating poor performance of transformer insulation of the LED flood light.

Drive circuit of LED light

3 , the detection coil is off . Place the multimeter R × 1, if a winding resistance is infinite , then there is open circuit failures of this winding.

4 , determine primary and secondary windings. The primary pin and secondary pin of the Power transformer are respectively generally drawn from both sides and the primary winding mostly is marked with 220V and the secondary winding is marked with rated voltage , such as 15V, 24V, 35V , etc. , according to these marked for identification.

5 , no-load current detection .

Direct measurement. open all the secondary winding and put the multimeter in AC current 500mA, string into the primary winding . When the primary winding of the plug into 220V AC power , what the multimeter indicate is the load current value. This value should not exceed the 10 % -20% of the full load current of the transformer. The normal load current of the power transformer of general common electronic equipment should be about 100mA . If out too much, then the transformer of the LED flood light short-circuit .

Indirect measurement. Series with a 10/5W resistor in the primary winding of the transformer£¬the secondary still full load. Dial the multimeter to the AC voltage . After power£¬use the two probe to measure the voltage drop R U across the resistor, then use Ohm’s law to calculate the load current -I empty, that I empty = U / RF.

6 , temperature testing. The allowable temperature rise of the small power transformers is generally 400C ~ 500C, if the insulating material is of good quality , but the allowable temperature also can be improved.

7 , detect and discriminant dot end of each winding . When using AC adapter of the LED flood light, sometimes two or more secondary windings can be in series to use in order to obtain the required secondary voltage. Adopt the series method to use the power transformer , the same name ends of the each winding participating in series must be properly connected , which should not go wrong, otherwise , the transformer is not working properly .

8 , comprehensive detection and discriminant of the short circuit fault of the power transformer of the LED flood light. the main symptoms of the short circuit of the Power transformer are fever and serious disorders of the output voltage of the secondary winding . There are usually more points of the short circuit inside the coil inter-turn£¬ the greater the short-circuit current£¬the more seriously the transformer fever. The simple method of testing determining whether the circuit of the Power transformer is short is to measure the load current of the LED flood light. For the transformer existing the short-circuit fault , the no-load current value will be greater than 10% of full load current . When the short circuit is severe, the transformer will rapidly heat after no-load power for tens of seconds, there is a hot feeling when touching the core. At this point£¬we can judge that there is short circuit for the transformer of the LED flood light without measuring the load current.

Browsing http://www.lead-lighting.com for more information about the LED flood light and other LED lighting.

Resource from http://www.lighting-ledlight.com/index.php/how-to-detect-the-power-supply-of-the-led-flood-light-and-other-led-lights/



Why choose the LED tube light for office lighting

13:39, 7/10/2013 .. 0 comments .. Link

The general public places includes the offices, office buildings, commercial centers. Because the office space require office staff to keep the mind fresh, comfortable and peace of mind for long time so that work efficiently without feeling tired. Then the office lighting should create a good working environment, office lighting are usually based on the functional needs in the office, while taking pretty advantage of natural light, combining with artificial lighting in order to maintain stability, reasonable, comfortable , healthy light environment. The artificial lighting is necessary to meet the illumination requirements, but also the illumination is uniform ; reducing the strobe effects of glare lighting to reduce visual fatigue of the office staff . So cool light color should be used , the color temperature is better between 4200 ~ 5300K, which is closer to the morning light in order to remain calm and clear mind . Ceiling mounted LED tube light can be used , LED downlight, LED ceiling light for corridors or auxiliary lighting, the fluorescent ceiling metal reflector can also be used , the embedded aluminum reflector grille fluorescent with ceiling is often installed in the offices .

LED tube

Office lighting requirements :

1 , select the appropriate color temperature and color rendering index, > 4000K color temperature is generally selected in the workplace, color rendering index is Ra ≥ 75.

2 lighting levels : different environments, different places have different requirements for lighting . Workplace illumination shall meet the requirements , usually 500-1000lx.

3, the illumination uniformity: reasonably arrange lamps so that the illumination is uniform and the office is maximum, the gap between the minimum and average illuminance is less than the 1/3 of average intensity.

4 , comfort and glare control : the ratio of the high brightness or luminance is too large in the field of vision , it will make people feel dazzling glare . Measures to prevent glare light is mainly limited intensity , rational arrangement of the light source . If the light source is at more than 45 degrees of the sight to form a shielding angle or opaque material blocking light.

5 , security: the safety of the lamps structure is mainly considered, electrical safety, whether the lighting meets national standards and pass the 3C certification.

6 , energy saving and environmental protection: selection of high luminous efficiency light source, high efficiency, long life , reasonable light fixtures , high-performance , long-life accessories. Generally choose batwing light distribution with light , the light intensity can be uniform and widely distribute. Based on the above office requirements, LED tube light is recommend as the main office lighting.

The dimensions of the caliber of the LED tube light is the same as that of  the traditional fluorescent lamp , the length is 600mm, 900mm and 1200mm, 1500mm, the power is 9W, 14W, 18W and 25W, and actual power consumption of 20W traditional fluorescent is approximately 53W , actual power consumption of 40W traditional fluorescent is about 68W; 9W LED tube is brighter than fluorescent light 18W , 18W LED tube is even brighter than traditional 40W fluorescent lamp , LED tube light is soft and comfortable to make people more receptive to . the Life span of the LED tube is 20,000 -30,000 hours electricity £¬the supply voltage is AC85V-260V ( AC ) , without starter and ballast, quick start , low power, no flash, not easy visual fatigue. It is not only more environmentally friendly but energy superpower . LED tube is the main product replacing the traditional fluorescent lamp.

Browsing http://www.lead-lighting.com for more vivid and prettier LED tube and other LED lights.

Article from http://www.lighting-ledlight.com/index.php/why-choose-the-led-tube-light-for-office-lighting/



What must be taken care when designing the LED ceiling light

13:39, 7/10/2013 .. 0 comments .. Link

First of all , the LED ceiling light is generally installed where the air convection conditions are good in order to achieve sufficient cooling effect, keep the housing of the radiator unobstructed so that the heat timely spread out through the housing .

LED ceiling light

Second, the metal shell and the power line and the shell of the LED ceiling light should be connected to ground (FG)£¬the reliable grounding is to ensure safety , do not mistakenly connected the shell to the zero line.

Third, please check on each terminal connection of the LED ceiling light again before running, don’t energize the LED ceiling light until make sure the input and output , AC and DC , single phase and multiphase , positive and negative , the voltage and current values are ​​undoubtedly correct.

Fourth, the Department of leakage current: when multiple power supplies are used, all of which intake the same ground , the total leakage current is composed by the sum of the leakage current of each unit, then to check the reliability of protective grounded line and whether the grounded resistance achieve requirements£¬in case of being electrical shock .

Five , for the switching power supply of high-power LED ceiling light and LED Downlight, there are generally two or above the ” +” input terminal and ” – ” output terminal , in fact they belong to an output electrode , just to allow users easy wiring and the plurality of terminals are connected internally.

Six , for symmetry with dual output load , the preferred symmetrical output power .

Seven , LED switching power supply add the resistive load previously factory , for use in capacitive or inductive the load£¬which should be described in the order in advance.

Eight , the defined input power of AC input power = output power / ( input voltage * power factor * efficiency )

Above all , for the users whose FG is not grounded, the hemp feeling is normal when touch housing or output power of the LED ceiling light , there is 110V AC output when the FG floating around the earth, which is determined by the internal structure of the power of the LED ceiling light.

Just browsing http://www.lead-lighting.com for more practical use and characters of the LED ceiling lights and other LED light

Resource from http://www.lighting-ledlight.com/index.php/what-must-be-taken-care-when-designing-the-led-ceiling-light/



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