I have the middle ones off cause the lights were closer, it got hot in there, no vents, i usually use this whole cab as a grow spot, but im not living on my own anymore as of now, thats why i raised the lights, cause i have it made there the reflector is inline with the size of the box, so it was a small place, heating up fast, not too hot in there, tho i dont got a thermometer, never had any problems before so it should be good, just keepin myself busy until i get another job