My space is approximately 3'x7'x6' (actual: 3'3"x7'4"x6'). I'm currently running 2 600w single-ended HPS and they are about due for a bulb change ($200). I veg in the same space with a 400w MH.
I'm considering swapping to 3 315w CMH or 3-4 240w Kingbrite LED's.
I already have 3 hoods...