There are many ways to achieve white light led, the most popular one is to apply a layer of yellow fluorescent powder on the Blu-ray Wafer, so that the blue and yellow light are blended into white, so the phosphor's material has great influence on the attenuation of the LED. The most mainstream fluorescent powder of the market is YAG yttrium aluminum garnet fluorescent powder, silicate fluorescent powder, nitride fluorescent powder, compared with Blu-ray LED chip has accelerated aging white led effect, and the different manufacturers of phosphors of the impact of light failure is not the same, which is closely related to the raw material components of phosphors. Lehman Photoelectric selection of the best material white fluorescent powder, make the white led compared to the same peers in the attenuation control has greatly improved.