The Exo Terra Full Moon is designed to simulate natural moonlight in your terrarium. The Full Moon mimics moonlight, allowing you to observe your animals at night without disturbing their natural behavior. Crepuscular and nocturnal animals can navigate their territory and search for insects or mates with this moonlight. The Full Moon is equipped with a light sensor and automatically turns on after the terrarium lights are turned off. Since the Full Moon emits very little heat, the temperature in the terrarium can drop at night, just like in the wild.