Sorry, a che is a ceramic heat emitter. They cost more than a bulb but when used correctly they last much longer and become cost effective. Just use them with the proper heat fixture and it will work great. I use the wire fixture. The issue is when the wrong fixture is used the heat backs up and burns out the unit.

I don't know what to suggest since I don't know the size of the cage but just like the bulbs they have the recommended cage size on the box.

This link has it for 16 bucks which is outstanding. They are usually 40.
http://www.amazon.com/Zoo-Med-Cerami...eating+element

http://www.amazon.com/Zoo-Med-Wire-C...omed+heat+lamp