What are we going to use when the incandescent light bulb is gone?
I like light bulbs for heat, but when they burn out, then what. I like the heat tape idea too.
I once thawed a pipe along side a cement block wall that had a small crack in an otherwise 72° basement. The slight breeze blowing into that crack hit the pipe and eventually froze it solid. It was 3/4" copper.
Insulate and tighten it up.
Probably the best thing is a small space heater on a thermostat.