Glossary
Ceramic heat emitter
A screw-in heat source that produces infrared warmth with no visible light, most often used to hold night temperatures without disturbing sleep.
A ceramic heat emitter, often shortened to CHE, screws into a standard dome fixture like a basking bulb but produces no visible light at all, only infrared heat. That makes it a common choice for maintaining nighttime temperatures in enclosures that need warmth around the clock, since many reptiles are disturbed by light running through the night the way they would not be by a nocturnal drop in temperature alone.
Ceramic heat emitters run hot and stay hot as long as they are powered, so they should always run through a thermostat rather than being plugged in directly, and they need a fixture rated for the wattage used, since standard plastic dome fixtures can melt under a high-wattage ceramic emitter. Many keepers use one during colder months only, switching it off once ambient room temperature is warm enough on its own.
A frequent mistake is assuming a ceramic emitter is safer than a bulb because it does not glow, when in fact the ceramic surface itself can reach temperatures high enough to burn on contact if an animal or a keeper's hand touches it directly, so cage placement should keep it out of reach. Pairing one with a basking bulb for daytime heat and the emitter for night heat is a common and effective setup, provided both run through their own thermostat.