OK so I'm planning on building my box 2x3' by 5' high, and about 3' of it will be buried underground with 2 sticking above, so this will be outside where the temperature is anywhere from about 40* to 55*, planning on growing 2 to 4 plants in it. So far I've got 1 - 80mm computer fan for an exhaust then plan on making a couple 3 inch intake outlets and 1 fan probably to circulate air in the box. And as for light maybe a 400w HPS. How does this sound?
HIGH All, you plan on having this box outside with a 400w HPS...won't work. How do you plan on keeping this "buried outside box" out of the elements? Best just to throw some seeds out and grow from there.