Compact Fluoros have, time and time again, proven to be powerful enough to produce a good final product. Your problem... Is that you're using tube Flourescents which, time and time again, have proven to produce a bad final product.

My suggestion is to go down to home depot, and pick up a really, really cheap 120v 70w High Pressure Sodium Floodlight. This is enough to make one plant flower really nicely... And costs around 60$... You could probably get a good 1/2-1 oz off of a 2ft high plant with a 70w HPS, saving you around 100$ in bud prices.