1. If we design led pcb for grow lights, we often use Samsung LM301B, LM301H, LM301H EVO, Samsung 660nm, Osram 660nm, Osram IR 730nm, LUMILEDS UV 415nm , Seoul UV 395nm. All led chips are 100% original. 2. If we design led pcb for other lights, we often use Epister, Sanan, EVERLIGHT, Hongli led chips and other famous brand. If our clients have special requirements, we will follow their request. We guarantee that all led chips are 100% original and purchase from offical channels. The led chip's package is 2835, 5630, 5730, 3030, 3535, 5050 and COB etc.