yeah bro one thing that i had a seriously hard time containing with my first 400 watt was the HEAT. Those things really let it out if you dont have an air cooled hood. Be prepaired for that. HID lighting for such a small area is a tough one. Some people would probably even tell you that having a 400 watt hid in that room without an air cooled hood could be a fire hazard. If you live in a cool place though , you may be better off. Im in florida and its hot here : ( . only other thing i saw was the thermometer/hygrometer should be a) level with the plants canopy throughout their life b) if you have hygrometer , the main reader should be 2 to 3 feet above the light at the top of the room to measure heat rising and sensor should be at the canopy level of plants out of the light. Good luck. Any other questions , lemme know.