the room is not enclosed, it is in the basement of my house, so its a lil cool, temp is b/t 68-78 degrees w/ the light, 3 sided area with a white shower curtain i am using to reflect the light back into the room w/ is sorrounded in mylar...i leave the curtain open during the day and closed at night w/ a 3 in. gap for a lil fresh air, the temp changes when the heater/ac comes on in the basement so i am assuming there is good ventilation...any advice would be appreciated