Escape if you have a look at my KingJohnC 400 Watt LA Confidential Seed Cabinet Soil Indoor Grow Journal you can see how I have my equipment hooked up.
KingJohnC's 400 Watt LA Confidential Seed Cabinet Soil Indoor Grow Journal
Thanks KJ. I used a 400 W MH light with a 6 inch exhaust fan into a scrubber, the ventilation fan serves 2 fold to remove excess heat plus brings fresh air in the cabinet. My intakes are 2 2inch holes in the bottom with pvc. I have one blocked off and I'm holding a very comfy 76-77 degree temp. My seedlings seem to really like it.