Hey man. First off nice drawings. Second off if you want to know if you can pull an oz off of that amount of wattage. Yes. As for you not needing an exhaust. I dont know about that. You will just have to do a quick test run for a day or two with your lights in there and see what your high and low temps are. I would recommend putting more light in there but in the last pic you had 150w and that should be more than good for just an oz. I just pulled an oz out of a pc grow with only 104w of cfls and alot of LST. Its in my sig if you want to check it out. If you get it up and going post so pics so we can take a look at what you got going on. Keep up the good work. STAY HIGH!!