cause corrosion of the device.

    For packaging purposes, there is an important factor affecting the LED life is corrosion. LED use  LED Bulb  in general is mainly due to corrosion caused by moisture penetrate the packaging material inside, resulting in deterioration of lead, PCB copper corrosion; sometimes, with the introduction of water vapor movable conductive ions reside on the chip surface, resulting in leakage. In addition, poor quality of the device package, at the inside of the package a large number of residual bubbles, bubbles these residues also cause corrosion of the device.

(3) Thermal stress failure LED Strip 

Temperature LED optical properties has been the impact of the important factors, and in the study of LED failure mode, taking into account the work of scholars as the ambient temperature accelerated stress to the LED accelerated life test [8,9]. This is because the LED system without changing the thermal resistance, package pin solder point temperature rises, the junction temperature will also increase, resulting in premature failure LED. LED Module