Here's some pics of my new grow cab so you can get an idea of what i'm working with , during veg just the 400watt MH is running , but during flower both the 400 watt MH and 400 watt HPS will be going. The lamps are separated from the grow area with a couple sheets of glass, with there own ventilation. The grow space also has its own separate ventilation.The cabinet is 6ft tall 4 ft wide and 18 inches deep of grow space. During peak flower there will be 133watts sq ft in that bad boy. I tested the lamps pre-grow and am having no problem keeping the temps in range. Right now seedlings are on a platform to be closer to the lamps during growth I will have to lower the platform because I have a fixed lamp position. Ive still got some things to do before I get this bad boy exactly the way I want it but as it stands now when I crank both lamps on its like a lil sun coming out of there, heh.