LNeed a lot more, I agree that at least a dozen are needed. You can get 150W CFL's that put out about 5,000 lumens, get two of those with a clamp reflector
incadescent equivalency is meaningless, you can start a couple of seeds with just a 23 watt then you'll need more after a couple of weeks, a lot more if you want a decent quantity of harvest.
I'm in a 3x3 grow space and I use 6 85 watt CFL's and these are actual watts not replacement watts. I use 3 6500 Kelvins and 3 2700 Kelvin's for a mixed spectrum and I'm only growing two plants. Both are doing quite well.