I wish somebody would come out with a 25 watt, infra-red lamp - just for my well houses.
It doesn't take much to keep them from freezing, but a little something.

My sister-in-law replaced a burned out bulb in the wellhouse, there, last year - with a LED bulb.
Didn't work.
"Pipe is a four-letter word - that leads to many more." Yours truly.

I've always been a curmudgeon - now I'm an old curmudgeon.
~Molɔ̀ːn Labé Skýla~