I don't think there is any one "right" answer because there are so many variables. I grow for personal use, quality, and stealth. I don't really care how big or how small my plants get. I'm going for quality and privacy not quantity. I use DWC bubble buckets with an LED and Fox Farms complete line and I'm satisfied. I also have a large 250 Watt CFL for supplemental lighting. I would say you need to define "quantity" then go from there. Are you talking mega commercial poundage or just having a large personal stash?