sounds like you're well on the way. You didn't mention whether you have your lights vented and the size of your ducting for your fan. With 800 watts being generated, equals approx 2500 BTUs of heat you are putting into that room. My suggestion is to run the room for a few hours without plants in them and check your temperatures after a few hours..... you will want to stay BELOW 80F, 75 is ideal, over 85 is "not good enough"

keylime