The Zoo Med Nano Ceramic Heat Emitter Reptile Heater is a 24-hour heat source that can help keep all your reptile pals warm and toasty. This porcelain heating device screws into a standard porcelain incandescent socket (sold separately). Then, it gives off intense infrared heat. It emits no light, so you can use it both day and night. It’s perfect for small geckos, hatchling reptiles, amphibians, arachnids or tarantulas.