The set up that is use is also very simple it is a 18 inchs lenth, 18 inch width, and 30 inchs tall....with 3 cfls that equal to 6,000 lummens..I use one fan and i have a vent in the back of my box.
I use 3 side mounted floro's and 2 quad combo CFL's. In addition to the light source i use 2 intake and 2 exhaust fans supplemented by 2 mini circulation fans inside my grow box