I just found out that someone in Saskatchewan Canada is putting 20 GT2’s in an underground green house. The green house is 360 sq. ft. (16′ x 30′), 10′ deep, as the winter there is quite severe, and the frost line go down 5′ in winter. The green house top will be covered by plastic so the sunlight could come through, and it is under construction right now. I am anxious to find out more info and what results they would get. 20 GT2’s!!! Is that cool or what!