A CHE is not to be used in a regular heat lamp fixture. If you read the box it instructs you to use the wire frame type. They are about 23 bucks at both big pet stores. Using a regular fixture the heat will back up and burn out the unit.

I have two CHE units in the proper fixture that have out lived all of my bulbs and I keep the CHE units on 24/7 and the bulbs gets 12 hour shifts.