So, here it is. who has flowered under strictly T5 and what T5 set up did you use? :thumbsup: Ok, I have a 6 light T5, and I'm getting ready to start flowering some of my harem. Put some of the ladies to work. I'm thinking of doing a four/two combination. AMF, I'm going to get four red bulbs, and starting with either a red/white/red/red/white/red, or red/red/white/white/red/red sequence. Give me a scientific opinion on that please. I think some white is needed for growth too during flowering, but just not as much. And what you are saying is making sense as far as lumens and yield per lumen/square ft.