THE SETUP: DWC/Aeroponic hybrid system w/ 5 in pots (8 plants), 400w hps/hallide conversion light on adjustable light hangers, and I'm growing ice strain feminized from holland. Using botanicare CNS17 premium nutes, with Bontanicare Karma (catalyst, enzymes, beneficials) I have two 5" circular airstones being pushed by a 2800cc air pump, and 180 gpm water pump. Using Sure To Grow (STG) grow 1.5" cubes and Hydroton. Grow room is 4x5x8 (20 square feet or 2 sq meters.) Room is a walk in closet w/ a standard swing door. I sealed the sides and top for seepage. Room is completely lined with Mylar (2mm) on all walls and ceiling. Floor is carpented lined with tempered glass on top. Using Alen airpurifier, and a humidifier or dehumidifier if needed. 20" box fan for circulation. --- I see time after time on these sites that people never give the details of their setup and then get asked over and over what they are using in order to answer their question(s). So I don't think I left out anything. - Anyway, the questions are.... How many plants do you think I can grow in this room with the 400w hps? Do I need an additional lights for another 8 or 12 plants in the confined space? How much does the mylar assist in reflecting light to the lower branches once the plants beging to grow higher? (I plan to veg to 24"-36" before flowering) I'd like to expect 2lbs from each 8 plant Bubbleponics set up; is this unreasonable? (ICE strain is a Northern lights/Afghan cross est 550-650 g/m2) Also considering using a 2x5x8 (10 sq ft) porch closet as an auxillary grow room. Will one 400hps/hallide conversion be enough for this confined space w/ 8-12 plants? How much will aspiration per plant affect the humidity at 75F? I'm not new to growing, but new to cannabis. I'm growing for sale. Thanks for you advice. If I forgot something then let me know. Thanks again Indy