I decided to add heat to bantam house Any tips

[chicken pickin]

So I decided I need to add heat to the bantam house. I was going to try to avoid the heat lamp because I dont want the heat to cause other problems like fires or power going out than chickens getting too chilled etc. But last week we had a few nights dip into the negative digits BUUURRR and I was very nervouse for my tiny bantams. They seemed to do ok though. But yesterday I noticed 2 of my Roos with large single combs are starting to get a little bit of dark on the comb tips. Im so nervous now about frostbite. So the reason for this thread is for those of you who do add heat. Any tips I should follow like a certain wattage or turn on only at night or only on certain nights. Id appreciate any advice and so will my little Roos.

 

[ChickensAreSweet]

For my bantam shed I use a thermocube. I plug the 100 watt light bulb lamp into it (actually I have a timer that I plug the thermocube into so it only comes on at night sometimes, other times I take the timer out of there and run the light all the time with just the thermocube).

So if it dips below 35 degrees, the light comes on, then goes off when it gets to I think 40-45.

But they also sell a sweeter heater that is supposed to be very safe.