It's 2-100 gallon Rubbermaid containers 1-with the bottom cut out and 150 watts of cfls attached to the inside walls I have 350 watts of cfls that seal of the top of the box. I have intake and exhaust fans, DIY carbon filter thank god it works seeing this whole set up sits behind my headboard in my bedroom anyways I'm using co2 and dyna grow nutes still have 2 D.P Starryders in 5 gallon smart pots these are gunna yeald 2 or 3 times as much