Most Efficent?

whats the most effeciant cabinent grow?i was wondering what parts and what size cabinet would be best and most efficent

do a vertical grow

I think the best is LST. I used it for my first grow and loved it. I used LST on northern lights, although I didn't have to; its already small. I used it on Haze x Skunk and turned out nice. See pic.

That's 2 different plants in LST!