It really doesn't matter, stay away from the blurple lights, spend a little more now and get a great light. Hlg quantum board, or something like that, but stay away from the blurple lights. I have 5 of them. I don't use, I wouldn't sell them cause I try to keep my karma clear. So I spent around a grand on crap lights, you don't have to. I'm using CMH now, but am going to be getting a couple of the qb LED. About a hundred dollars more, but a thousand times better. Good luck.
Amazon.com: Newest Quantum Board led Grow Light Dimmable 320W 480W Samsung QB288 LM301B chip Mix 660NM,RED UV IR, 7 Years Warranty: Garden & Outdoor
www.amazon.com