i have seen five pound plants off of one light. but you you gotta grow trees with aero or dwc etc. this aint no ebb and flow or drip system with cubes were talking here.
Hmmm.... I'm kinda on the fence about that claim, but when I was a youngster and did that kind of thing, I never tinkered with light spectrums and CO2 levels. It's pushing the bar, but I think it's possible with technology available from controlled environments that the brilliant folks at Growlife are sure to be able to design. :-)