Comes with E27 bulb base, compatible with a variety of bulbs. Such as ceramic heat emitters, UVA UVB bulbs, infrared heat lamps, etc. (Note: no bulbs). Can be used for a variety of reptiles and amphibians, including bearded dragons, geckos, snakes, turtles, tortoises, iguanas, lizards, chameleons, frogs, toads, etc.