Hi there! Bout to start up a new grow, this one will be bigger and better, so I'm looking into ventilating my 400w 6" cool tube. It will be traveling just a few feet to outside of the grow tent on both sides, so I'm pretty sure I don't need a really powerful fan. Not knowing what each fan is used for, the prices are quite different. I see these '6" inline duct booster fans" for $30 on ebay, and I also see $90 inline fans that look like they could launch my grow tent into orbit. I understand the boosters are usually for long trails of ducting that need, well, a boost. So my question, is it possible to just use the booster as an exhaust fan hooked directing to the cool tube? Or is there something I'm missing here? If it is possible, would one work? Or should I have two, one on each side of the light? As usual, any help is appreciated. Thanks.