I'm currently running a sun system CMH hood/ballast with the 3100k Phillips in there, and I am VERY impressed with using it to start seeds and veg, I will be around to chime in once I get into flower these lil ones. Nice change after a 4-5 year hiatus from gardening.
Never had near this fast growth with 4x8 T5 setups, plus much less fan/duct/AC than the old MH required I had before the t5s.
Just need to see final weight and of course resin and terpene production vs what I always have had quality-wise under HPS...
but they seem to be loving the spectrum and intensity and less heat too! this is my first run with CMH and I doubt I'll ever go back to HPS, but I may do a run in summer with LED/CMH together to see the results of the mixed spectrum, and then next run after that just LED on its own so that I can decide if I can do LED in summer and CMH in winter or if I can keep temps in range with either setup and/or can maybe use both in two separate flowering areas.
Can't thank you guys enough, if it wasn't for this thread I probably would have kept on blasting AC to cool HPS in a bit bigger setup right now instead of using the CMH and not needing any additional AC, just a couple circulation fans regular 4" size can fan to cool the 3x3. Much love club 315!