I'm sorry....I may have said this wrong but I stand by my info.....1kw should cover a 10x10 room fine. This is information I got from someone who's knowledge I trust completey so whether or not I do math right.....1kw should be plenty for his room. Mines 8 x4x 8with 1k watt and no problems or yield issues unless I just get too greedy to give everyone enough space. I still think he's got too many plants. I fit four-6 decent sized in mine. He's got 12.

I did always suck at math.