Fan size for cooling lights

[monkeyhammer]

I am in the process of planning a 6x8 room. I am going to run 4 600 watt hps air cooled lights. I was going to use 1 fan to cool all 4 but decided it would be better to break it up into 2 sets of 2. So what size inline fan would you recommend for 2 600 watt hps's?
In addition to these fans I'm going to run 1 fan dedicated to circulation.

 

[dman1234]

most 6 inch exhaust fans are 460-560 cfm i would use two of them, you will be able to add filters.

 

[nouvellechef]

Really depends on a few things. Ambient air temps and needed air replecement if your not runnong CO2 and scrubbing room instead of exhausting out. I am running a seperate heater right now at night running 2k watts with 440cfm.