Do you have a diagram of your room and setup? You are right you need more light but it's hard to tell with out the diagram. You said 80 Sqft that's about 8x10 and in one of my rooms 7x7x7 I run as much as 8000w HPS to grow pounds of buds. You need to light the bottoms and all sides to increase the yield over the pound mark pr-plant. The CO² is a must and so is proper humidity control. What are you using to control the PPM of the CO²?

There are several waysâ?? to get pounds of buds one is by growing trees and that means less plants. The other is by growing more plants in the same area, growing them short and only yielding an ounce or 2 on each one. NFT will work for this type of grow because you only use clones and veg them for about 3 weeks then flower like normal. You need a good mother or two to make all the clones from. NFT will not work for growing trees or any really large plants. NFT is good for short cycle small plants.

Yes Hydro will grow that fast if you let it. Ebb & flow is different and so is using Rockwool in hydro. I think everyone around here know I am not a fan of Rockwool; to me it's just one step above dirt farming.

Sativa need a long flower time and will grow up to 12' or more before they finish. Sativa is not really for indoor growing unless you have the ceiling height and plenty of lights.