Imo T-5s should not be used for flowering...just not enuff light. I'm a cfl grower and I use a 1400w cfl unit in the same space. I've upgraded mine to 2000 watts and use 16 2700 bulbs and 4 6500 bulbs in flower..with bomb results! Oh got my unit from
http://www.cfl-growlight.com but I didn't pay the $179 they wanted. Instead I called them and they hooked me up for $159