Exo Terra Reptile UVB100 T5 VHO Tube

The Exo Terra Reptile UVB100 T5 VHO is a Very High Output fluorescent tube built for reptiles, amphibians, and invertebrates that occupy the cryptophotic zone — the shaded, low-light environments where direct sun exposure is naturally avoided. Manufactured in Germany, these tubes are designed to deliver consistent UVA and UVB output for 12 months or more, making them a dependable long-term lighting choice for your vivarium or terrarium setup.

Built for Shade Dwellers

Cryptophotic species — often referred to as shade dwellers — are typically active at dawn, dusk, or during the night. They seek indirect or filtered UV rather than basking under intense direct light. This tube's output is calibrated to replicate that filtered solar spectrum, providing physiologically appropriate UV exposure without overwhelming these naturally light-averse animals.

UVA, UVB, and Why Both Matter

• UVB output supports healthy Vitamin D3 synthesis, which in turn drives calcium absorption and guards against Metabolic Bone Disease
• UVA emissions help stimulate natural behaviours including appetite, activity levels, and reproductive cycles
• A carefully developed phosphor blend replicates the solar UVB spectrum rather than producing a generic broad-spectrum output
• Very High Output (VHO) technology delivers superior UVB penetration compared to standard T8 fluorescent tubes and compact energy-saving alternatives

Suitable for Taller Enclosures

The enhanced UVB penetration of the VHO format makes these tubes well suited to deeper terrariums or setups fitted with mesh or screen lids, where UV intensity would otherwise be significantly reduced before reaching the animal. This extends the usable working distance between the tube and the basking or resting zone.

Range of Sizes

The UVB100 T5 VHO is available in four sizes, covering a range of enclosure lengths and lighting requirements. Whether you're lighting a compact terrarium or a larger vivarium, there's a tube suited to your setup — select your required size and wattage from the options above. Exo Terra recommends pairing these tubes with a compatible T5 Terrarium Top canopy for optimal performance and correct fitment.

For keepers housing cryptophotic species and looking for a reliable, German-manufactured UV tube with a proven output lifespan, the Exo Terra Reptile UVB100 T5 VHO range offers a straightforward, well-specified solution across a variety of enclosure sizes.