Well, many of us do things in the throes of winter to keep farm animals warm or just from freezing. for te last few years, when it drops below 10-15* or so I plug in a large red bulbed heat lamp over chickens to just take off the bite of the cold. It's just one ofhte metal shielded clip on lamps.
This morning I open barn door, WOW, the smell of burnt wood smacks me in the face. I look over to coop, there is no red light glowing, I immediately pull plug on the extension cord. When I get in the coop, I find the light is lying on top of my PVC feeder and my old rooster dead by the door. He was on his last leg anyway and he always roosted right under the light. I think maybe he had some death convulsions and knocked the light down from over head.
Anyway, when I removed light, here was what I saw in pic below....crispy PVC pipe. Thankfully light landed there vs on any wood in the pen. It was charred, but did not acively catch fire.
From now on, lights will be securely attached versus just clipping onthe rafter if I use them again.
I also refuse to use thopse heated water buckets, I've heard too many barn burnings caused by them shorted. My goats would chew the cords anyway.