Thanks, but I didn't invent it. I'm just an satisfied customer of a great idea.I love your invention, jackie! I have too many of those tins. Thats what ill use on my new coop. ( if 40eatts eill be warm enough here..)
In the type I use, the light bulb needs to be in a little porcelin fixture.
Or a small lamp if you like.
Search "chicken water heaters" on you tube. Maube seeing them will give you an idea of how safe they seem.
My concern. For fire risk was about the wire getting frayed. I just made sure that it was all covered, and not pinched.
You could always put a cinder block or paving stone between heater and floor if you want.
Jack