If the LED doesn't work out, I was thinking of using an air cooled tube w/reflector. But what I want is a 150w HPS ( or MH, not sure which would be better?) bulb on each end of the tube to give me 300 watts. The Sqft of the inside dimensions of my cabinet is actually 7 sqft., so these bulbs would give me 42w/sqft. However, I've never seen a tube with a bulb on either end. Or is this a ridiculous concept? I was thinking of a tube like this, I suppose I could could Macgyver an extra socket at the tube outlet, but not sure if this would be safe.
hmm not sure why the pic didn't work... Anyway, it's a 32" long tube...