what I did was put one computer fan, 120mm right above the light, (in the pic you can hardly see it on the left side above the light) pulling air out.. the hood has little vent holes right there where a lot of the heat (i'd say about 40 percent of the heat) rises through, and gets expelled instantly.good looking box redivider, I am amazed you can keep the heat that low with a hps in a rubbermaid
the rest of the heat is generated by the light itself. to handle this i put an 80mm fan in the back (which you can see in the pic) blowing cool air in.... there's also 4 passive intakes in the bottom on the sides...
i think it's gonna be a struggle getting that to run completely cool with the two lone fans. i'll probably change the fan that's above the light with a 70cfm pc fan off newegg. and take the one that's above it and move it to the back where the 80mm fan currently sits.... the temps will def. be under control then.....
what i like most about this is that it has a little latch on the lid, so when I close it it latches shut, no chance of it falling for some random reason.....