Find out why LED lights are dimming， We need to know a term LED light decay
LED light decay refers to the fact that after a period of lighting, the light intensity of the LED will decrease and cannot be restored. The reduced part is called LED light decay
Compared with incandescent lamp, fluorescent lamp, LED lighting is improved on light decay, but also cannot overcome light decay problem completely. There are two main factors.
LED quality
The quality of the LED chip is not good, and light decay is fast.
There are defects in the production process, LED chip temperature is too high, which aggravates chip attenuation.
Heat dissipation performance
The better the heat dissipation performance, the lower the LED working temperature, the smaller the light decay, the longer the LED life.
Drive failure
LED beads are required to work at low dc voltage (below 20V), but our usual mains voltage is high ac voltage (ac 220V). The electricity needed to turn a municipal power supply into a lamp bead through a device called an "LED constant-current drive power supply".In theory, as long as the driver parameters and lamp bead plate match, LED 连续地工作can continuously work. The inside of the driver is complex, any device (such as capacitance, rectifier, etc.) failure, it is possible to cause the output voltage change, and then cause the dimming.
Drive failure is the most common type of LED failure, usually, after the replacement of the drive, can be resolved.
The LED burned
The LED itself is composed of lamp beads. If one or part of the LED is not bright, it will inevitably darken the whole lamp. Beads are usually connected in series and then in parallel -- so if a single bead burns out, it can cause a batch of beads to go dark.Burnt lamp bead surface has obvious black spots, find it, connect a wire to its back and short-circuit it. Or replace a new lamp bead, can solve the problem.
The LED occasionally burns down, perhaps by accident. If frequent burn-out occurs, consider the drive problem -- another manifestation of drive failure is burn-out lamp beads.
After knowing the cause of light decay, it is easy to extend the life of LED lighting. Although the light decay is certain, but the size of the light decay we can control. To extend the life of LED lamps and minimize light decay, the following points should be done:
Choose LED lamps of good quality
First, we should try to choose LED lamps with better quality and heat dissipation performance. Also should reduce the workload of lamps and lanterns as far as possible in use process.
Correct installation
Installing indoor lamps and lanterns correctly is the premise that lengthens lamp service life
If the installation is not correct, the lamp is easy to break, sometimes even burst, short circuit fire, very dangerous.Regular inspection
Check the fixtures regularly, especially the chandelier. Check the circuit for aging, and the suspension that should check light is safe.