Hps/Mh lighting system

ive done plenty of research on cfl's and i was considering putting the new light bank from stealth hydroponics in my room its a 315w system that gives off 20,000 lumens but i was looking at this site last night that had a hps/mh 250w that gives off 33,000 lumens and i was wondering if i put that into a 26'' x26'' space if it would make it too hot or if my plants would have room to grow up my room is 60'' tall

HPS/MH-$170
High Tech Garden Supply

CFL-$200
SH Hydroponics > Multi Spectrum 315 Watt CFL Light Bank

thats the site i was looking at. the depth of it is 5.5'' and my bubbleponics system is 14'' so that leaves rouphly 40'' of space to grow with but i no they have to be so far away from the plant so i figured about 38-39" was the tallest my plants could get. i really no nothing about these lights but the number of lumens is 33,000 flowering compared to the 20,000 i would get flowering with the cfls and 65w less power used so it seems like a wise desicion to consider. if i have only 38'' of space to grow when would i have to put them into flowering around 12-13''? the system is cheaper for a veg bulb and a flowering bulb than the cfl system is for just the 27k bulbs and uses less power and from what i hear hps does wonders in comparison to cfl but i dont wanna get the sytem to find out that my space is too small and will get too hot

any feedback is appreciated thanks to all you experts that help us newjacks from wasting a lot of time and money messing up

anybody out there

sounds hot for a small space. how many plants?

4 plants . im gettin an extra 80 cfm fan to help keep it cool in the

CFL's will never compare to a good HID setup. period.

ok im going with the HID lights so ohow do i keep such a space cool im getting a 80 cfm fan to put on the exaust and ima hook my old one up to the intake is there anything else i need to do i keep the room outside the box at 75 degrees constanly