4 Feet Plants ?????

I have 4 bag seeds that are 40 inches tall and they are in a 4x4 room under a 400 HPS how many grams do you think I will get off each plant with 8 weeks og flowering???

depends on how the plant looks. Do you have a lot of leaves, stems, nodes, how fat is your main cola...? But i'd say a 4ft veggin plant is pretty big

if you get less than 2 oz. for 4 4ft., then you fucked up. So ballpark, 50 grams.

At the end of flower they will probably be 45 inches