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Ways to reduce light decay of high-power LED street lights
by：Litel Technology
2021-11-21
Ways to reduce light decay of high-power LED street lights
Light decay is the main reason why high-power LED street lamps can’t work for a long time. An important way to reduce light decay is to improve and strengthen heat dissipation. If the heat dissipation design of the lamp is not in place, the junction temperature of the LED chip will be too high, This leads to deterioration of the performance of the chip itself and the encapsulation resin, resulting in a decrease in luminous efficiency and a shortened life. Effectively improving the heat dissipation of LEDs is the key to swallowing high-power lighting fixtures. LED high-power street lamp heat dissipation technology. The time when the brightness decay of an LED lamp reaches 30% is defined as its life. The LED itself has poor temperature resistance, and its luminous decay brightness is a gradual decay process, and the initial decay time is related to the quality of the lamp itself. In addition, it is mainly related to the contact temperature of the lamp. Masters have realized that light decay is the reason why high-power LED street lights cannot work for a long time, and they have also begun to realize that an important way to reduce light decay is to improve heat dissipation. From the test results of some high-power LED lighting products, the light decay after 1200 hours of lighting, the best is 8%, the worst is 26%, and the average is 14%. The light decay of most manufacturers' street lamps still cannot meet the requirements of use.
Light decay is the main reason why high-power LED street lamps can’t work for a long time. An important way to reduce light decay is to improve and strengthen heat dissipation. If the heat dissipation design of the lamp is not in place, the junction temperature of the LED chip will be too high, This leads to deterioration of the performance of the chip itself and the encapsulation resin, resulting in a decrease in luminous efficiency and a shortened life. Effectively improving the heat dissipation of LEDs is the key to swallowing high-power lighting fixtures. LED high-power street lamp heat dissipation technology. The time when the brightness decay of an LED lamp reaches 30% is defined as its life. The LED itself has poor temperature resistance, and its luminous decay brightness is a gradual decay process, and the initial decay time is related to the quality of the lamp itself. In addition, it is mainly related to the contact temperature of the lamp. Masters have realized that light decay is the reason why high-power LED street lights cannot work for a long time, and they have also begun to realize that an important way to reduce light decay is to improve heat dissipation. From the test results of some high-power LED lighting products, the light decay after 1200 hours of lighting, the best is 8%, the worst is 26%, and the average is 14%. The light decay of most manufacturers' street lamps still cannot meet the requirements of use.
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