Yeah, fluorescents aren't great for flowering, so your yield might be a bit disappointing w/ that t5 and a few cfl's. I just bought an hps after using 24 14-24 watt cfl's, and my plants have responded viciously well
... I would personally try and find a way to use that t5 more efficiently ... possibly by hanging it sideways ... ??? ... or getting more mogul sockets and adding more cfl's. If you want to flower w/ cfl's, i would purchase a lot of 100w equiv. "cool white" (appear a redish-yellow) and use them. Just keep in mind i was barely getting 25000 lumens w/ my cfl setup, and then w/ my 400w hps ALONE I was able to get 55000 lumens. Might want to consider a small investment in a good light. HTG supply my friend. Regardless of your decision I wish you good luck!