My first grow was CFL's only (eight 100w). I pulled a little more than an ounce out of 1 large and several runt females. Using CFL's is extremely easy. The low level heat made it possible for me to take a 10-day vacation during flowering and they survived with a small wicking setup. I've only sampled a tiny bit, but it seems pretty decent.

But I'm shooting a POUND with my second grow in the same space (hopefully eight females), using 8 100w CFL's and then adding a 400w HPS for flowering.