It is a very common phenomenon that LED lights become darker as they are used. The main reasons are the following three points:
Drive is damaged
LED lamp beads require low DC voltage (below 20V), but our usual mains is AC high voltage (AC 220V). To turn the mains electricity into the electricity needed by the lamp beads, a device called "LED constant current drive power supply" is needed. In theory, as long as the driver's parameters match the lamp bead board, it can be continuously powered and used normally. The internal part of the driver is more complicated, any device (such as capacitor, rectifier, etc.) failure may cause the output voltage to change, and then cause the lamp to dim.
Treatment: Driver damage is the most common type of failure in LED lamps, and usually it can be resolved after replacing the driver.
LED burned out
The LED itself is composed of lamp beads one by one. If one or part of them is not bright, it will inevitably make the whole lamp dim. Lamp beads are generally connected in series and then in parallel-so if one lamp bead burns out, a batch of lamp beads may not light up. Treatment: There are obvious black spots on the surface of the burnt lamp bead, find it, connect it to the back of it with a wire, and short-circuit it; or replace a new lamp bead to solve the problem.
One of the LEDs occasionally burns down, it may be a coincidence. If it is burned frequently, the driver problem must be considered-another manifestation of driver failure is to burn the lamp beads.
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 in incandescent lamps and fluorescent lamps. LED lights can't avoid light decay, but its light decay speed is relatively slow, and it is generally difficult to see changes with the naked eye. However, it is not ruled out that low-quality LEDs, poor-quality light bead plates, or objective factors such as poor heat dissipation, resulting in faster LED light decay.
