Hey norcalgreens. First of all you do not have enough light. With 6 1000w's over a 12 x 16 space your at 31.25w per sq ft. You want at least 50. I would run 12 1000w's. Putting you at 62.5w per sq ft. Then use air cooled hoods, 8", 4 lights per fan. You are going to have to check with a pro on...