It is said that nocturnal and carnivorous reptiles do not need Ultraviolet light, is an incandescent light bulb then sufficient?
Incandescents are only in some cases suitable light sources for nocturnal reptiles. We have to take into account however that many nocturnal reptiles are exposed to direct or scattered sun light during the day. Some rest/sleep on tree trunks or outcrops during the day, some deliberately bask during daytime hours while feeding at night and others start their activity before sunset. This means that some form of photosynthesis takes place with these species. Also many carnivorous reptiles still need UV light for photosynthesis purposes, correct environment, food and signaling perception. Not all carnivorous prey is capable of supplying the necessary vitamin D3 levels. If the prey’s liver is not consumed, vitamin D3 intake is inadequate. We can thus state that many nocturnal and carnivorous still require balanced lighting systems and that more factors then day and night cycle or infrared exposure have to be taken into account.
