Got it in a grow room size 3ft 6" wide by 5ft length x 6ft plus high no windows one full size door for entry just made an extraction hole 5 ft high opposite the door for a 5" fan that I had hanging around and am going to make a carbon filter from plans found on this site when i get round to it. Got a 250 grow light with my NFT kit and at present its on a timer for 15 hours on light is about 2 and a half foot above my little plant