also have vents at both ends and a fan when temps get too warm. I will check on it though as time passes. It is too soon to see if it lower bill as we have had a very mild winter.. But if I crank up the heat or the fireplace for a few minutes I can tell the heat lasts and is not going out through the attic. I also had it put in the ceiling of my unfinished work room which is under the living room. I can tell it holds back the chill that used to seep up from that unheated room.

Has the EPA made the light tower there in Edison switch to the screwy bulb?