The Exo Terra Day & Night LED is ideal for reptiles, amphibians and invertebrates with NO UVB-requirements, like snakes, nocturnal geckos, frogs, newts, salamanders, spiders, scorpions, insects, etc. The bright white LED's create a nice daylight, while the blue LED's mimic a moonlight shimmer that enable you to observe your animals at night without disturbing their natural behavior. The dim light of the blue LED's allows nocturnal animals to navigate in their territory in search of insects, mating-partners, etc... whereas in total darkness they would be completely disoriented. Simply tap the Day/Night logo touch button x to switch from bright daylight to blue night light c. The Exo Terra Day & Night LED is the most convenient and energy efficient way to illuminate your terrarium day & night.