USED WITH SAMSUNG DIODES- This leds runs at a lower temperature than normal leds so there is no need any heat sink. Phlizon QB grow light used with Samsung leds 238pcs , It also has higher light intensity, less light decay , better lumens and PAR values than ordinary leds. and can bring higher energy conversion and longer life. This grow light is a full-cycle lighting solution for all growing environments and is ideal for greenhouse or indoor sole-source lighting. DAISY CHAIN DIMMABLE DESIGN- The light can be daisy chained together to dimmable light intensity according to the needs of the plants. The leds are full spectrum. It contains 112pcs 3000K leds ,96pcs 6000K leds, 30pcs 660nm red leds. EXTRA TWO UNIQUE FUNCTIONS- No fans no noise and waterproof function. No additional fan zer.