Many people have this problem. The LED lights that have just been bought are always bright, but after a while many lights will get darker and darker. Why?

To understand why leds are getting darker, we need to know a term: "LED light decay."
LED light failure refers to the decrease in light intensity of the light intensity compared to the beginning of light intensity after a period of time, and the lower part is called LED light failure.

LED light curve diagram
LED lights, though compared to incandescent bulbs, have improved in light.
However, it has not yet completely overcome the problem of light decay, and the LED generation has the following two main factors:
1、 the LED products themselves have quality problems:
The quality of LED chips is not good, the brightness decline is relatively fast, or the production process is defective, LED chip temperature is too high, make the chip decline intensifies.
2、 thermal performance of LED lamps:
The better the heat dissipation, the lower the temperature of the LED, the smaller the light, the longer LED life will be.

So, the reason for the light failure is to extend the life of LED lamps. Although light decay cannot be changed, the extent of light failure can be controlled.
To minimize light failure, we can do the following:
1. Select quality LED lamps:
Buy lamps and lanterns should try to choose the quality and good heat dissipation performance LED lamps and lanterns, in use process is to minimize the work of lamps and lanterns, to slow down the speed of light failure, so as to extend the life of the lamps and lanterns.

2. Correct installation

The premise of indoor lamps and lanterns to extend the life of the lamps and lanterns: if the installation of lamps and lanterns is not correct, the lamps and lanterns is easily broken, sometimes even burst or short circuit on fire, it will be very dangerous.
For example: the lamp of toilet must choose moistureproof class lamps and lanterns, the lamp of the kitchen should choose to prevent lampblack and water vapor.
3. Avoid frequent lighting:
Increase indoor lamps and lanterns is in the need to pay attention to when using, do not frequently switch, lamps and lanterns at the instant of the frequent start, by the light source of current is greater than the normal work of current, make the die temperature rose sharply, will greatly reduce the service life of lamps and lanterns.