my 1st ever grow was an auto berry flower and kept light on 20/4. I was in hydro system with pebbles, and after i germinated in root cube I put in the hydro system on 20/4, and i yielded over 4 oz.
Trust me they can get BIG. Mine was 28" tall by 36" wide. Not sure how aero gardens work, but trust me they can huuuge. Saying this though my next one was a dwarf plant from the same bag that I bought. So it really depends. Hopefully you get a monster!!! Good luck mate