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Causes Of Light Decay Of LED Lamps

Nov 26, 2020

Causes of light decay of LED lamps

The light just bought is very bright when used. After using it for a long time, the brightness of the lamp will gradually decrease until it finally goes out.

We all know that the life of the lamp is gradually shortening, and it will be completely off one day. Many people can't help but wonder, why do lamps have such a process, and what causes it?

In fact, in the final analysis, this is the problem of light decay of lamps. To put it simply, lamps are the same as the human body. With the increase of service life, the functional mechanism of lamps is constantly decreasing. No matter it is incandescent lamp, fluorescent lamp, or LED lamp, the problem of light decay cannot be avoided.

The luminous decay of the lamp means that the luminous intensity of the lamp will be lower than the original intensity after a period of time, and the lower part is the luminous decay of the lamp. Different types of lamps have different causes of light decay.


LED light decay  

Although LED lamps are better than incandescent lamps and fluorescent lamps, they cannot completely overcome the problem of light decay. The light decay of LED mainly has the following two factors:

LED product quality problem

The quality of the LED chip used is not good and the brightness decays quickly.

There are defects in the production process, and the heat dissipation of the LED chip cannot be well led out, which causes the high temperature of the LED chip to increase the chip attenuation.

Use conditions

When LEDs are driven by constant current, and some LED lights are driven by voltage, It makes the LED decay too fast.

The drive current is greater than the rated drive conditions.

In fact, there are many reasons for the light decay of LED products, but the most critical issue is heat dissipation. The better the heat dissipation performance, the lower the operating temperature of the LED, the smaller the light decay, and the longer the life of the LED.

Luminous decay is a necessary process for the work of lamps. When selecting lamps, we should try our best to choose lamps with better quality and heat dissipation performance. During use, we should also minimize the workload of the lamps to delay the speed of light decay and extend the lamps. life.