I'll be ordering a 250w HPS setup for my next run, one plant, ten gallon smart pot. I want to tie the branches down outward so it grows into a super thick bush. The box I want to build for this needs to accommodate that type of plant. I will be using an autoflower, so it won't get too tall, maybe 120cm. I'm at a loss as far as what dimensions I should build the box to be so that I can have room to get full potential from this strain. I want it to be less than 4x4, maybe 2x3x6? L, W, H. Any suggestions?