BestVa is KingLED. They are the very same company trying to con folks into thinking it's another brand. They will work quite well, but they blow out constantly....around six months of usage. The 1000W actually only draws a little over 200 watts. The optimal coverage area with these is 2x3 ft. for veg at 18 inches. and 2x2 for flower at 18. Not very powerful, but will get the job done. I recommend using 2 of the 1000W models in a 2x4 area for best results. Also, I'd bring them with 12-14 inches over a very even canopy. It will work. Also...it's essential to have both switches on during flower, or you'll cut your PPFD in half. This will give you a PPFD at their centers of around 1127