Quote Originally Posted by Roughrider
The problem with small HPS/MH lights is that they really aren't any more efficient than CFLs. A 70w HPS light usually puts out around 5000 to 5500 lumens of light...between 70 and 80 lumens per watt. A 23w CFL from Wal-Mart puts out 1600 lumens...about 70 lumens per watt. I'd try to get at least a 150 HPS.
If you use the 70w HPS, you're still about 15000 lumens short--another reason to go to a 150w HPS. A 150w HPs will put out around 14000 lumens...that's a good 25% more efficient than the 70w HPS or the CFLs.

No matter what...you've got 4 square feet of floor area. Try and get at least 20,000 lumens in there. The way you described, it, you'd have a 70w MH or HPS on with two 200w CFLs. If you mean actual 200w CFLs, like these

Compact Fluorescent - 200 Watt - Full Spectrum 5000K - Energy Miser FE-IIIB-200W Light Bulb

then you don't need any more lights other than two of those. They're 10,000 lumens each. But if you mean something more like this

Compact Fluorescent - 42 Watt - Full Spectrum 6500K - TCP 28942-65 Light Bulb

then you've got 2800 lumens per bulb...you'd need five or so of them with your 70w HPS or MH to do the job right.

If I were you, I'd go with a 150w HPS/MH light. Then, try putting some T5 tubes along the sides and back. Two against the back wall, one on each side. 14w T5 lights put out about 1350 lumens each. You'd get good under canopy light too. Or, you can just hang a couple of sockets with Y-adaptors with 23w CFLs to go with the 150w. Just my .02.
Now that the ordering woes are over, I'm going to probably swing a 250 watt HPS (maybe 2 150 watt ones). I'll think about using the T5's on the sides also.

You think this would be ample light?