Need Advice on Venting Lights

Hello,

I'm setting up my first real grow and need some info on how to vent the lights and how much power I need.

I am about to order 4 Raptor(or similar) reflectors with 6" flanges for 4 Hortilux MH lights. I need to know how to duct them and how much fan power I need. I have been looking at the Active Air and Vortex inline fans but don't really know what I'm looking at.

Here is a diagram of the planned room. Right now the plants are vegging in a different room but will be moved to this one soon. Thanks!


SOIL GROW -

# of Plants - 30 - 60
Grow Type - Soil
Grow Stage - Vegetative
Smart Pots - 3 Gallon
Lights - 4x400W MH
Nutrients - General Hydroponics
Medium - 100% Soil
PPM - 400-500
PH - 6.5
RH - 60%
Room Temp - 73
Solution Temp - 68
Room Square Footage - 20'x20'x8'
Pests - None Yet

Problem: Need advice on light venting.

If you run them in a square pattern you might consider a manifold. This would allow you to cool all 4 hoods with one fan/filter.

Lining them up in a row would probably be most efficient if thats an option.