I am i a 4x3x7 closet, wooden, in the garage, 400w HPS 12/12 lights on at night with a hood like yours. It takes 3 desk fans for me to keep my sweat box under 90. A 400w has a footprint roughly 4x4~6x6ft depending on hoods. I recall in my reading 1000w will cover 8x8~10x10ft. You will face a)...