We all know that the most expensive part of led high bay is the chip. The chips made in China are mostly cheap with average quality. In order to meet the demand of exporting, E-lite Semiconductor uses chips from Cree, Nichia and OSRAM. Using those international high end chips, the performance of our product is much higher than that of other products. Chips with high quality can also guarantee that the luminous decay of our lights after five years of guarantee period can still remain below 30%.