hmmmmm,david, i have not yet seen a successfull scrog attempt with only cfls(if anybody has any pictures please prove me wrong ),.......the reason why you dont really want to use cfls is because of the stretch, you will get tighter more compact buds with and HID. although its not impossible, if you were gonig to try it(we all support you here), i would have as many cfls as possible and as close to the plants as possible while making sure you train and tie down each budsite to a hole in the screen...good luck