I believe ReefKoi, ReefFiltration and few other merchants use the same manufacturer out of China - BUT they get to customize the lights to their spec. They get to choose the type and number of LEDS, have some say in the wiring and what types of fans go into the units. The only thing that is the same is the case - ReefKoi and Reeffiltration warranty their own units in house so you wont have to ship to China Plus they use higher power and better quality internals (ie. LEDS) than the ones on ebay.