Quote Originally Posted by SimonMakus
No problem.

Actually, a 400w does 3x3 very well and I think getting the vent issues worked out won't be too difficult. You can run 8 or so flowering ladies in your space.
I run a 400 watt hps/mh in a 28"x28" space using a 6" cool tube and a 424 CFM inline fan to exhaust the light and the room.

I am drawing air from an 11"x11" passive intake

My air temps stay at 76 degrees with the House thermostat set to 75 degrees.

The light is about 4-6" away from the canopy top.

Despite the cool temperature, never let your buds rest on the cool tube if it can be helped. I learned that lesson the hard way. One of the tops of my main cola got toasted after it rested against it for a full day.