I have 2 spare bedrooms in which to set up a grow...my first so take it easy on me if I ask stupid questions...both bedrooms are roughly 14' square...is it necessary to cover the walls with mylar or will everything be fine with the current color which is flat white? I'm planning on starting out with 4 DWC buckets and can locate them anywhere in the room, so will it matter where? Does a corner make any more sense then the middle of the room?