What is the ambient air temp around the room and the temp the air is before coming thru the lamps?

for what its worth:

You have no sealed room once you make an intake, and you will have smelly air coming from it.
SpaceNeedle Reviewed by SpaceNeedle on . add a little more fan maybe? Ok here goes, my first grow. I am running in my flower room which is 9'x11'x7' 4x 600w hps lights all with vented reflectors. They are connected with flexible aluminum ducting. I was looking at the sticky where it shows the calculations for configuring your cfm and I'm not sure my 746, i think, Can Fan 8" HO fan is doing the trick. I have a couple of 90 degree angles and with that formula it says i need 1320 or so cfm to maintain appropriate venting. I am having a little heat trouble, staying Rating: 5