Also, those duct booster fans are pretty shit. They're alright at moving free air, or as a booster fan in a long ducting run, but I wouldn't bother trying to make it work in conjunction with a filter or more than maybe four feet of straight ducting, god forbid both.
Much better are centrifugal fans, like this http://cgi.ebay.com/New-4-Inch-Inlin...3%3A1|294%3A50

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Originally Posted by ceestyle
Don't be a martyr wasting $100 or more on CFLs to prove they're inferior for flowering pot.