Ceramic heat coils are a whole other thing, expensive, and I don't see any point, I agree.
A ceramic base heat lamp, around $8 or so at
TSC, is just a metal shade with a ceramic thingy where you screw the bulb in. What my Ace sells, which is intended for a shop light, has a plastic thingy to screw the bulb into.
OK so I am not an electrician.
I have one that has a plastic base for the light bulb, and used it for a while for my heat lamp, til I read about the fire threat here. They are fine for a shop light. Managed not to burn my coop down. But still.
At my local
TSC, they use the ones with the ceramic thingys that hold the heat lamp over the chicks. They were displayed near the chicks for around $8. They even come with a wire thingy that lets you run a second way of securing them (I used metal clothesline wire) so they cannot fall and set the wood chips on fire if the primary clamp system fails.
This does not include the bulb. The 250W red heat lamp bulbs are also around $8 here. I have read they come in 100W but have not seen them. I would have bought 100W only if I had found them.