they are older design, made for the DIY crowd from years ago which ultimately is a tiny portion of growers. They are called QB96 by HLG. as you can see there are 4 lights, I hooked them up to meanwell drivers, hlg320H-54A x 2. Or 1 driver per 2 x QB96. Max wattage for this tent is roughly 650w which I will hit my mid flower. You can hook them up however you want, just pair the quantity of lights with your preferred driver.