closed loop cooling on light mover

The other fan option is a 2905cfm 14 in fan and ducting.

http://botanical.com/hydro/air/calcu...uirements.html
Check this out. I believe this is what you are looking for.

I'm looking for a solution that is not exchanging the air in the room . I want to draw air in from an external source in through ducting through sealed hoods out of hoods back into ducting through a wall and out a fan that is sucking air through all of this. Most people are talking about air exchange to keep the room cool i will exchange air at minimal intervals i use co2 and ac to cool the room but could get a boost for the ac from the lights being air cooled , so this is why i need to know how many cfm's to cool a 600 without room air exchange entering the picture. Any help would be appreciated. I used 1000s before and all ac no air cooling trying something diferent to use less power.

Any advice on where to fey help on this issue?

Another option is to scrap the venting and get a proper ac. If your cooling matches your heat, with adequate airflow, you don't need to vent. That would be a better option in your case.

If you have invested enough to get a 6000 watt setup, why not buy a small central ac unit. You could call an ac company and work out the btu requirements. I'm sure they would be capable.

You want to cool 10-600 watters?

If its a straight shot the bigger one might work. Tough call, intake temps coming in the hoods could play a role too.

2000+ cfms across 6kw of lights, straight through, PURE BAIT FOR THE COPTERS, YOU WILL GET CAUGHT. Too much heat firing striaght out your yard.

Split your flower room in 2 and run 3kw opposite each other. Much easier to manange the heat of 3 kw, also wont scare the electric company.