How to predict LED life?

Reality problems: LED lights do not last long Although LED lighting has the characteristics of energy saving, environmental protection, long life, easy control, and maintenance-free, it is ironic that we often hear that the LED lighting power supply itself directly drags down the LED lighting fixtures. Becomes not “longevity”, which greatly increases maintenance/use costs; or inefficient driving of power supplies leads to energy efficiency conversion of LED lighting fixtures is not as high as expected, or because the output current ripple is not as good The control has affected the luminous quality, making the advantages of green energy saving of LED lighting greatly reduced and even affecting the market popularity.

How to predict LED life?

All things happen, develop and die. Although the life of LED is relatively long compared to the general light emitting device, it also has a certain life span. The early LED was just a gift like a flashlight or a table lamp. It took a short time and the lifetime problem was not prominent. But now LED has begun to be widely used in outdoor and indoor lighting, especially high-power LED street lamps, its power, high heat, long working hours, the problem of life is very prominent. In theory, it can be 100,000 hours of life, but in fact it is not known. So where is the problem?

If you do not consider the failure of the power supply and drive, the LED's life is reflected in its light decay, that is, a long time, the brightness becomes darker and darker, until the final extinguishment. The time to decay by 30% is usually defined as its lifetime.