You want full spectrum CFL's with the highest Lumen rating possible 6500K.
You want to get the largest ones you can 42w + 65 is better. A friend of mine uses two 125w.
You can have a small chamber but you will want more than just a couple lights in there if you want any kind of yield.
Venting will be a problem. Vent your hot our out on top and vent your cool air in from the bottom.