I have a speical spot that keeps the temps cool. I am running a cool tube now and plan on a tube again with a Vortec fan that vents out side and I have one of those tall fans that are really slim and it has a filter and oscillates, plus the dehumidfier (I only flower here, veg elsewhere). Also temps stay in 70-87 range with a crappy vent fan now even in the hot times of the year. I might switch the 400 HPS for a 400w T5 to spread the light better for side light. Which would you run? I do run CO2 as well.