I have a CHE on ceramic base that is clipped/zipties to a shovel handle that we have zipties/chained on hooks to raise lower to adjust. We've used CHE for reptiles for years so pretty comfortable with them : ) we only used it outside for our Mama when she hatched 6 Dec 1st (Indiana here) for...
Indiana, my Mammaw and them did it every year for like twenty years and never lost any until it was time to butcher. They were also in a draft free barn brooder area. Granted it was all they had and it worked for them.
If you can find a 100watt incandescent bulb, that's what my Mammaw and her grandparents used to use for 100 chicks every year (years ago) lol. We used one for a month for our broody/chicks just to raise temp a bit in her lovely frigid January lol