I used 9- t12 fixtures, each housing two 40w warm/cool in each. I only used them because it's what i had laying around. I don't remember how long i vegged, but they were between 8"-14". Out of the five i managed to get almost 80g total of very light and fluffy bud. it wasn't bad, but just did not weight.
i don't see how running cfl's, t5's, or t8's would be much different. I mean really the only difference would be power consumption.
My advise would be instead of spending a bunch of money on fls pick up a med size mh/hps coverable lamp and be done with it. I got a 400w ($250) running in the same space i had done my t12 grow with two clones from that grow and look at the difference. each being about 3/4 weeks into flower. I changed nothing by the light. still using premier pro mix bx and fox nutes.