Talk about the reason of LED products' light attenuation.
- Adopting bad LED chips cause the luminance fading fast.
- The production process exist some flaws. The heat of the LED chip can't diffuse well from the PIN feet. That causes the high temperature of the chip and aggravates light attenuation.
Second, the reason of using a condition.
- LED always use constant current driver but someone may adopt constant voltage driver that makes the excessive LED light attenuation.
- The driver's current is higher than rated requirement.
In fact there are many reasons that cause LED products' light attenuation. The heat is the key problem. Many factories don't care about the heat dissipation but after a long time the shoddy goods they produced will appear a serious light attenuation. The thermal resistant of the chip, the effect of the sliver colloid, the heat dissipation of the aluminum circuit board, colloid and gold thread all can influence on the light attenuation.