I'm running into the problem where my temperature in the box is rising to 80 degrees. So obviously I need some ventilation. I'm thinking of jigsawing a hole in the back and putting an exhaust fan in with intake holes in the front. My question is this: How the hell do you keep light from coming in and still vent?

__________________
Every thing I say on this website is FICTION. Pictures are found online. I just like to pretend I grow.

place the vent hole near the top of the box, use a piece of ducting to create a tunnel and tape some black plastic big enough to cover the hole but only tape the top part so that the air still gets out but when fan turns off the black plastic falls back over the opening. aka light trap.

__________________
http://www.rollitup.org/grow-journal...ck-horror.html http://www.rollitup.org/view.php?pg=...article&id=589

Ah, I think I understand. So only run it during the "daytime" hours, as it doesn't need to vent at night.

What about the intake holes?

__________________
Every thing I say on this website is FICTION. Pictures are found online. I just like to pretend I grow.

same thing but the hole needs to be near the bottom and the plastic needs to be on the inside.

__________________
http://www.rollitup.org/grow-journal...ck-horror.html http://www.rollitup.org/view.php?pg=...article&id=589

your going to want twice the as much intake as exhaust. for example if you have a 3 inch exhaust you will want 2 3 inch intakes