I have maxed out a 4x8 and 4x4. using a soilless mix, LED's. Growing autos, and learning to grow them well. I have a window AC, and a large dehumidifier. 4x8 stays open 24/7, and right now using the 4x4 as a 12-12 because I had some autos that needed 12-12 to flower, and they are beauties. 2...