...then it might be enough, at least for the first half of vegging, and maybe a bit into flowering. Try to give 'em "warm white" 2700k colour temperature CFLs for flowering, if you can. If you wanna go exclusively with CFL lighting, try to budget a couple of extra weeks for proper flowering, as flourescent lighting doesn't usually have the same level of 'canopy penetration' as a decent HID light.

As a basic rule-o-thumb, tho, you want to get somewhere between 7000-10000 lumens per square foot of coverage, so you might wanna double the lights you have in mind (assuming a 40w CFL puts out about 2500-2700 lumens).

For vegetative growth, you want a mix of 4100k and 6400-6500k colour temps. If you have it in your budget, try to pick up a decent ballast and a HPS 400-600w for the flowering time. Also budget for some heat removal if you go this way--you don't want to stress your lovely little girls when they're flowering. Don't ask me How I Know This

Hope this helps!