I'm setting up a new grow tent. The tent is 2'x3'x5'. The light that I have for this tent is a 400w HPS/MH (I have both bulbs) in a pyrex glass tube fixture(cool tube). I have a 6" duct hose coming directly off of the light fixture. That is reduced to 4" and there's a 4" inline fan pulling the hot air out of the grow tent and venting to the outdoors. I have a dimmable ballast that puts out 50,75,or 100%(that's what it says anyway). My concern is, even with the ballast set at 50%, and all intakes uncovered for max air-flow, I can't get the temp inside the tent below 94 degrees. Is this gonna be a problem? Should I maybe switch to all 6" ducting and a 6" inline fan? Or would it be okay to grow at this temp doing a 18/6 veg cycle as opposed to a 24/0. This is my first grow and I've spent way more than I need to already. I'm hoping for a cheap solution. Please help me.