the first few photo's show 1 of 4 fans that are placed on the roof, 2 intake, 2 exhaust.. the ventilation tubing can also be seen in the photo that shows the attic goin over my air mattress, along with over the diesel tank.

there is in that 44kw of lites, most are sodiums, and 1 row is of 400MH, which is why they are placed directly next to each other.

ventilation is very easily controlled with them large belt fans. I have a jpg somewhere showing the room in all its glory at a very respectable 80F.

incognito: nope thats at a diff location and under thousand watter MH bulbs