Gently fasten the light bulb into a UL approved incandescent fixture (sold separately). Do not plug the light fixture into an electrical socket until the bulb is fastened firmly to the fixture. Place the light fixture outside the habitat enclosure. Never place the light fixture inside the enclosure as a hot bulb can harm your pet.
Hermit crabs need a habitat that replicates their natural environment as closely as possible. Daylight bulbs simulate the heat your hermit crab would normally receive from sunlight. Consult a pet care guide to determine the proper amount of heat your pet requires.