First time post, This is what i did, but it would prolly be better to mount your exhaust fan higher and your fresh air intake lower, remember hot air rises.
I built a Plexi-glass box with thin wood frame and plexi-glass top its about 2x2x3 1/2 I have four two foot T-5's and a 42 watt cfl and one 3 1/2" muffin fan (that i picked up at frys for 15 bucks) blowing in the side of the box at about mid level. the T-5s are I guess 2000 lumens apiece and 24 watts, the cfl is like 2700 lumens, I covered two sides with black trash bags. I got one them battery powered humidity/ temperature guages and through it in there around mid-level the temperature and humidity fluctuates from 75-78 F and around 58- 65 H most of the time it stays at 75F and 65H. Just recently I was bitten by the bug so i went out and got a 150 watt HPS. I put the thing on the top of the box and turned it on it started to deform the 1/4" thick plexi-glass. No shit dummy. so i cut a hole in the top and it sits perfectly, very minimal light escapes. Them temperature now rises to 92 degrees constant and 45% humidity, i have one more muffin fan that i will mount on the top to exhaust the heat. every night a couple mins before the lights go out i spray them down with some seltzer water, these muffin fans move about 80 to 100 cfm i think. ill mount it tomorrow and let you know how it gos
