grow room design please help

smallC

Member
I want to construct a grow box with the following dimensions: approximately 70" l x 32" w x 4-5' h. It's going under a dorm room bed. I was considering buying one, but i would like to build one that allows me to maximize my capacity to harvest as much bud as possible in those size dimensions. I would really appreciate experienced input, as I am a new grower and would like to learn as much as I can from other people's mistakes. Please don't diss me for my naive expectations, but I figured that each plant would require about 7 inches of floor space, meaning I could shoot for around 32 plants in the box total (4 rows 8 columns), leaving space for about a 10 inch cloning section (2.5 inches floor space per clone, 4 columns about 12 horizontal rows). Is this a realistic expectation? I was thinking a Gib-lighting 400watt HPS would function well for the veg and flower section. My questions are:
1) How many plants can I expect to squeeze in this thing and what strains do you suggest that are fairly short, have good yield, and are potent?
2) Taking into account the above question, what kind of light would function best for each section? while on the subject, what exactly does grams-per-watt mean and how does the number of plants factor into that ratio? Does that mean that I could have 20-30 plants and get only say 150-200 grams off of a 400 watt light through a harvest cycle?
3) What grow box design would maximize my potential yield?

I would really appreciate all the input I can get on this, please help me out (keep in mind I am trying to maximize the possible yield of this setup. Thank you
 
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