The Zoo Med ReptiSun Terrarium Hood 36" T8 is a low-profile lighting solution designed to provide essential UVB and visible light for your reptile's terrarium. This hood is specifically designed to hold one 36" T8 size linear fluorescent lamp (bulb sold separately). The built-in reflector maximizes the light output, allowing for deeper penetration of both visible light and UVB rays into the terrarium. UVB light is crucial for reptiles as it aids in the synthesis of Vitamin D3, which is essential for calcium absorption and the prevention of metabolic bone disease. This hood is compatible with ReptiSun 5.0 UVB lamps for tropical species, ReptiSun 10.0 UVB lamps for desert species, and NatureSun linear fluorescent lamps for amphibians and snakes. Key features of this terrarium hood include a convenient on/off switch for easy operation and an energy-efficient, flicker-free electronic ballast (featured on the 30" and 36" models). Its low-profile design makes it a sleek and unobtrusive addition to any reptile enclosure. The hood is designed to fit terrariums 36" wide and up. * Designed for T8 fluorescent lamps * Built-in reflector for maximum light and UVB penetration * Helps prevent metabolic bone disease * Energy-efficient, flicker-free electronic ballast (30" and 36" models) * Convenient on/off switch