Great Thread! I have started the largest scrog that I've been involved in. Ive built a 7' by 16' room in my garage and am utilizing 5' by 14' of that for the scrog ill have approximately 18-20 plants under 3 1000watt air cooled hps lights. I currently am struggling with the dry air I get because of having to run 2 heaters to keep it warm during veg ( it gets really cold here this time of year) I have 2 humidifiers running 24/7 to help offset this and am able to reach 50% fairly consistently. I have a question about my ventilation.. I currently have my filter piped back into the room. Will this affect my crop even if I am constantly drawing in fresh cold air over my lights with the light cooling ventilation. I am hoping to yield about 2 oz per sqft. I also have 5 white widow autos going into a separate 4x4 room under a 400 watt hps. I don't know if ill scrogg the autos, I hear its not beneficial to my yield to scrog autos ( any thoughts)