I use 2 cfl UVB reptile bulbs and 1 30" t10 tube in my grow. 1 cfl and the tube are 10% UVB and one cfl is 5%.

I saw results in my flower girls within 3 days! More trich production, and interestingly, tiny petiole leaves turning away from the UV light sources!

UVB, IMO, is the missing link to flowering under fluorescents.

I use an 8 tube (with 6 bulbs) T5 4' fixture with red bulbs and the above uv bulbs. A friend likened my bud to that grown under 600w HPS. good, tasty, frosty. Just not quite as tight buds as I would have gotten with more red in spectrum.