This is a Reptile One 50 Watt Night Heat Globe Lamp Eddison Screw Fitting - Snakes, Lizard. The Night Heat Lamp is a low light heat source designed to provide a blue hue to help replicate natural moonlight conditions while providing a heat source for nocturnal reptiles. This can be used in conjunction with a Daylight Basking Lamp to replicate natural lighting conditions. The low light heat source can be used for night time heating and can be alternated with a day lamp.