And the room/fans/environment...

Pic 1: My 2 400w HPS with air cooled hoods. You can't see it, but there's an exhaust fan with a carbon filter behind the lights.

Pic 2: My 16" oscillating fan that keeps air moving around the flower side. You can see my passive intake in the upper right.

Pic 3: close up of 4" passive intake. delivers air to the center of the room. i think i need at least one more of these.

Pic 4: My veg side. Tower fan, keeps it movin.

Pic 5: my exhaust fans taken from outside the room. The left has the carbon filter, the right cools the lights. they are both on 24 hours.