My first post!

200w of CFL is fine for flowering in 3 square feet. (And I'm guess that you're using typical CFLs, which means you're getting around 14,000 to 15,000 lumens.) You'll see a lot of different information about the amount of watts or lumens per sq. ft. A lot of it will be good, but you need to be more specific about some things. The big question is--How far from the plants are my lights? You need to keep CFLs close to plants--less than 3" all the time; half that is preferable. An HPS will seem to produce as much or more light, even though it is rated for fewer watts...but that's because it's rated for watts at a certain distance (usually 8"-1'). If you have your HPS farther from your plants than this, you'll start to lose watts. Still, HPS is generally going to increase your yield because of light intensity...HPS lights penetrate the canopy better than CFLs do. But you also get more heat, which can result in more stress and ventilation issues.

If you go with CFL's, do two things. One, get reflectors. Use the lumens your bulbs are putting out. Two, try putting one or two in an area where they get under the canopy. You'll get better growth below and your buds will fill out better. HPS is simply more powerful, but you can make adjustments with CFLs to increase your productivity. Good luck!