Well thanks dude. Anyhow heres my plan... And I am open for advice. PLEASE. Setup: Approx 82 cu.ft space insulated,located inside outdoor shed. (1) 400w grow light (ballast outside of box), (1)65cfm exhaust with inline carbon filter located at top of box exhausting to interior of outdoor shed (I'm thinking this exhausted heat will add warmth to shed area ?. (1) oscillating fan in box, Min. 28-30 sq. in. intake duct with damper located at bottom of box. (1) ceramic cube heater inside box. set to come on at 72F.. I will have 18/6 on light for veg. then set to 12/12 for flower. Exhaust fan will be plugged into a programmable thermostat control outlet set to come on at
78F. and off at 73F. This I am hoping will control the heat produced by 400w light. And that the light will provide sufficient heat inside box when outdoor temps go below freezing... EXPERIMENTING IS FUN