LED annular patch ceiling lamp used less than half a year, a few days ago suddenly become very dark, what is the reason, how to solve?
LED lamp, crystal quality, size, and is related to the power supply, need constant current and constant voltage, light is not serious, the constant current tube is not the quality of the solution is to change the lamp, but the power is not good, so we should change the power, but need to support, so, or change the lamp,,,
If it is half a year to gradually darken, that is, the entire lamp materials are low-end, but if suddenly dark, and that is the power problems
Two possibilities. 1, the drive power fails, and its output current becomes low, resulting in distribution to the LED, current down, LED dimming. (this will be specific to see the driver power, for many reasons) proposed to change the whole light2, the original LED and drive power does not match. The maximum current output drive current is more than LED can bear, a long time, resulting in serious decay, dark (personally think that this is a great possibility that now drive the cost down, LED accounted for a lot of cost). It is recommended to change LED, the same number of strings, plus a few more (that is, increase the number of LED)Or please professional people with change, this is not bad, then, bad, basically the whole is better, and the main problem is matching.
