A 23 - 26 watt spiral CFL is equivalent to the 100 watt bulbs you are using now.
40 watt CFL's will give you almost twice the light you have now, and it will be closer to the proper spectrum for growing.
You should use bluer light (>5000k) for veging, and redder light (2000-3000K) for flowering.

AND you're still going to need ventilation, or you'll burn up your plants.
psteve Reviewed by psteve on . grow box is 160 degrees + in under a minute. please help Hey so i currently have a couple seedlings growing under some lights in my room. http://img253.imageshack.us/img253/5385/dsc00135rw2.jpg i have a grow box in some room in the garage. Its a transparent container that i painted white on the inside, and then hooked up 2 bathroom light racks each with 3 spots, and a hundred watt max per spot. http://img227.imageshack.us/img227/7735/dsc00130rv2.jpg http://img511.imageshack.us/img511/545/dsc00131nz1.jpg Rating: 5