And electricians out there

If your trying to keep your water system from freezing and you've already got electricity in the shed, I've had excellent results using typical body heating pads wrapped around a few critical parts like my pressure switch and taped in place. Takes virtually no amperage (draw), even in multiples, and has prevented freezing for several seasons now. My overnight lows in Dec. and Jan are typically in the low to mid 20's. I won't be going back to lights as an indirect heat source, ever.