with 125 heat bulb it was staying in the 99 ish range which of course I thought was too hot too, but they were still huddling up and not trying to move away from it. with regular bulb (43w was all i had). it’s staying about 85-90 and they are still huddling a bit more than I would like but doing better. it’s between 65-71 in our living room where they are and still near freezing outside. little dummies keep sleeping in the food dish!!