Exo Terra Reptile UVB 100 T8 Tube

The Exo Terra Reptile UVB 100 T8 tube is designed for reptiles living in shaded tropical and rainforest environments, where UV exposure is moderate rather than intense. Available in two sizes to suit different vivarium and terrarium setups, this tube delivers a carefully calibrated UVB output that mirrors the filtered, indirect sunlight found in humid, high-canopy habitats.

UVB Output and Environmental Match

This tube replicates the UV conditions found in shady tropical locations — environments where weather, humidity, and overhead canopy naturally reduce the intensity of sunlight reaching the animals below. It is suited to forest-dwelling species that require moderate rather than high UVB exposure, and the output is designed to sit within the appropriate Ferguson Zone for those animals.

Vitamin D3 and Calcium Metabolism

The UVB 100 is engineered to achieve an optimal Vitamin D3 yield index, supporting D3 photosynthesis in reptiles kept indoors. This directly aids calcium absorption and reduces the risk of metabolic bone disease — one of the most common preventable conditions in captive reptiles.

Packaging and Setup Guidance

Every tube comes with detailed packaging that includes a full spectral graph, a UV spectral graph, and the Reptile Bulb Rating System. Distance-related data is also provided, covering UVB output at varying distances, photosynthesis data, Ferguson Zone guidance, and an Exo Terra UVB reference chart — giving keepers the information they need to position the tube correctly from the outset.

Sizing and Placement

The range is available in two sizes, making it straightforward to match the tube to your enclosure dimensions. Larger sizes can span multiple terrariums side by side, offering a practical option for keepers running more than one forest or tropical setup.

Whether you are building a new bioactive rainforest terrarium or upgrading an existing setup, choosing the right tube size for your enclosure is straightforward — select from the available options above to match your vivarium's length and lighting hood.