300 cfm or 500cfm?

I'm looking at using one this companies inline fans
Soler & Palau Commercial Centrifugal, Axial, Propeller, Exhaust and Supply Fans - Soler and Palau - HVACQuick.com

Either the td-150 or td-200

If I use the 200 I'll need a 8" to 6" reducer to work with my cooltube.

There won't be any 90 degree angles so i was wondering if the 300cfm would be sufficient?

My cabinet is 36" wide 24" deep 54" tall.

any suggestions?

Im thinking a 300cfm would be just fine.

any other opinions?

What lights are u using? 300cfm should be good for at least 600 watt

Microracer87 said:

What lights are u using? 300cfm should be good for at least 600 watt

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I was thinking a 400w hps, but if someone says it would be ok id use a 600w hps