I am planning on begining construction of my grow box, and would appreciate some input. I have a 6'x20' storage unit that I am going to house my box. 2-300w CFL for Veg. 600w HPS light for Flower. 4-6 5gal bubble buckets with recirculating resivoir. Planning on doing a Scrog, but debating wether to go vert or horiz. Contemplating doing clones after I switch to HPS, basically swapping the position of the lights within the box. Some of the questions I have are: How much distance from my buckets should my screen be if I go horiz? How high should the box be? I can probably go 7' without any troubles. Should I keep my res inside or outside the box? The storage container should stay pretty cool since it will be dark and is in full shade. How much more effective is mylar vs a solar reflective paint for the interior. Basically, I am looking for box dimensions so I can start framing it this weekend. I am in construction and have plenty of leftover lumber to do this. Then I will be figuring out the ventilation etc... Thanks for your help!