So the grow space is 4 X 4 sq. ft on each side, so 4 X 8 total....... the gavita LED's above each side are about 44 inches X 42 inches, so they fit perfectly above 12 plants.
This is my 7th full grow under LED's and I'm averaging around 52 oz on each side of the room. So total room, I've gotten between 96 and 108 oz a grow. Basically, 2.3 GPW a grow. Strong numbers, but I've been growing for almost 40 years (I'm 65) and worked in the industry for years so I know my way around plants, fertilizer, plant issues, etc. But my overall method is keeping things as simple as possible start to finish.