yeah, i do basically that idea. i bought steel racks from costco that have adjustable heights and i basically created a hallway out of them. i have a vertical air cooled tube with 3 600 hps and i hung it vertically on a light mover. The light column moves down the hallway with plants on either side. my veg room has another light tube with a circle of plants around them. ultimate efficiency! 2 g. per watt, and im not even using co2 yet!