I want to know if that will work or not. The can max 8" is 675 CFM, in a room with an ambient temp of 75, 4x 1kw lights, in a row- also what's a good way of calculating this on my own in the future so I don't have to ask again? Is there a formula for CFM and light cooling? Or is it just one of those things you just have to try and see? I'm currently using to cool 2k in a row and its working fine and the air is barely even warm on the exhaust side. Ultimately, I'm trying to get away wtih cooling two rows of four 1k's with 2 can max 8"ers.