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[Chimera]

What is important if you're going to use a CHE is to ensure that you're wiring is correct and will account for a large amount of heat from the globe. There was a case on this site a short time ago where a short occurred in the light fitting, the conclusion from an electrician that inspected the fitting was that the CHE melted the insulation on the wires causing the short. Be extra careful with your wiring for any CHE over 100W as they will release a lot more heat up through the fitting then a standard red globe.

Secondly, you will need to take care to scope out your heating requirements correctly, CHEs go up to 250W and that much heat can get a 4' cage above a pythons critical thermal maximum in the case of a thermostat failure.

Thirdly, I have red globes that have been running for well over a year on a Microclimate dimming thermostat. These remove the transient effect induced by on/off thermostats that blow globes.