I have 2 5x5's and a 5x10 that I run 2 1000 watt lights in. Amazingly, I can run both lights about 6 inches above the canopy. I do this by having 2 inline fans exhausting out the hot air, running lights at night, fixed fans blowing between the empty space of canopy and lights. I keep my RH around 45-50% first 4 wks and drop it to 35% after that. Spend time in the room, if the conditions are uncomfortable for you then they are uncomfortable for your girls!
I use a 600w hps with a cooltube hood 1 4inch exhaust fan pulling from carbon filter to hood then out of the tent. Temps are steady at 21. The cool tube is great. The duct work is not in yet but that is my set up. Sent from my E6560T using Grasscity Forum mobile app