Some Success. The room floats between 80-85 degrees(based on outdoor temp). The room exhaust is active more than I would like it for reasons of Co2 enhancement, but I suppose if I get a larger exhaust this will help. Also will reposition my lights to have straighter lines in my flex tube. Right now there are 5 90 degree bends, I can shorten it to 3 bends. Also thought perhaps running flex tube from 3rd light through a cooler of ice and water. dont know If this will have an effect at the velocity the air is running, but the real fun in growing is the discoveries one comes up with through experimentation.