ExoTerra Reptile UVB300 T5 VHO

The Exo Terra Reptile UVB300 T5 VHO is a Very High Output fluorescent lamp built specifically for heliophilic and euphotic zone reptiles — species that bask under intense, direct sunlight in the wild. Manufactured in Germany, this T5 tube delivers a powerful blend of UVA and UVB alongside a balanced visible light spectrum, and is rated for 12+ months of reliable UV output. It is available in four sizes to suit vivarium setups of different scale.

Designed for High-UV Species

Reptiles from open or midday sun environments have evolved to exploit peak solar intensity — regulating body temperature and UVB intake simultaneously during basking. The UVB300 is built around this behaviour, producing the elevated UV levels these animals require for genuine physiological well-being. Its unique phosphor blend is formulated to replicate the solar UVB spectrum as closely as possible.

UVB, Vitamin D3 and Bone Health

Adequate UVB exposure drives Vitamin D3 synthesis in the skin, which in turn is essential for calcium absorption. Without it, reptiles are at serious risk of Metabolic Bone Disease. The UVB300 provides the intensity needed to support this process reliably across the lamp's full rated lifespan.

Very High Output — Built for Taller Terrariums

As a VHO T5 tube, this lamp produces significantly greater UVA and UVB output than standard T8 fluorescents or energy-saving alternatives. Enhanced UVB penetration means it remains effective at greater distances from the basking zone, making it a practical choice for taller terrariums or enclosures fitted with mesh or screen tops. The intensity of UV reaching the animal will vary with distance, so positioning should be considered carefully for each setup.

UVA Benefits

Beyond UVB, the UVA component of this lamp plays a direct role in stimulating natural behaviour. UVA exposure is linked to improved appetite, increased activity levels, and healthy reproductive behaviour — aspects of husbandry that fluorescent tubes without UVA output simply cannot support.

Compatibility and Setup

• T5 VHO format — requires a compatible T5 controller or fixture
• Recommended for use with the Exo Terra T5 Terrarium Top
• Available in four sizes to match enclosures of different length and depth
• UV output rated for 12+ months of continuous use
• Manufactured in Germany

Selecting the correct size for your enclosure is straightforward — choose from the variants listed on this page based on your vivarium's dimensions and fitting. Whichever size you need, the UVB300 delivers the same high-intensity UV performance that serious reptile keepers rely on.