yeah, I have a 600 in a 2x3x5. I usually keep it dimmed at 450 (But it can handle the 600 if i turn the fans up).
I have a cool tube and inline fan for the light (Air outside tent -> cooltube -> back outside tent)
Second fan pulls air out of the top of the tent and pushes it through a carbon filter. I allow air to come in at the bottom of the tent passively (Will get pulled in based on negative pressure created by you carbon filter/fan setup. I like to be able to control this fans speed.