Not sure it's relevant but i have similar size specs and i have 1x 400w digi and 1x 600w (magnetic ballast), plus a 200w cfl and a 55w (5.0) reptile ubv uva bulb (dimentions of tent-80x80x120). i have x1 two speed 125mm extractor 'Pulling' the air through two cooltubes, i have a 100mm extractor...