Why the longer the LED light is used, the darker it is?

2020-05-14 16:46

Why the longer the LED light is used, the darker it is?

It is a very common phenomenon that LED lights become darker and darker. The main reasons are the following three points:

1.Driver damaged

In theory, as long as the parameters of the driver match the lamp bead board, it can be continuously powered and used normally. The internal of the driver is more complicated. If any device (such as capacitor, rectifier, etc.) fails, it may cause the output voltage to change, which will cause the lamp to become dark.

Treatment: Damage to the driver is one of the most common failures in LED lamps. It can usually be solved after replacing the driver.1-1ZR914415O60.jpg

2.LED burned

LED light is composed of one by one lamp bead. If one or a part of it is not bright, it will inevitably make the whole lamp dark. The lamp beads are generally connected in series and then in parallel-so if a certain lamp bead is burnt, it may cause a batch of lamp beads to be off. 

Treatment: There are obvious black spots on the surface of the burned lamp bead. Find it, connect it with a wire to the back of the lamp, and short it; or replace it with a new lamp bead. 

3.LED Light decay

The so-called light decay is that the brightness of the luminous body is getting lower and lower-this situation is more obvious on incandescent and fluorescent lamps.

LED light can not avoid light decay, but its light decay rate is relatively slow, it is generally difficult to see changes with the naked eye. However, it is not excluded that inferior LEDs, or inferior bead plates, or due to objective factors such as poor heat dissipation, lead to faster LED light decay.