I just had a thought.
I remember once we had to bend a PVC pipe.
There was a flexible wrap that went around the PVC and plugged onto 110v.
It heated the PVC so we could bend it to fit.
Could this heater, with some kind of regulator, be used as a lube heater????
It could be wrapped around the tube, and would keep the lube heated, and not the whole bottom of the luber.