Exo Terra Reptile UVB100 T5 VHO 24W 22" Terrarium UV Tube | PT2381

The ET Reptile UVB100 T5 VHO is a 24W, 22-inch Very High Output fluorescent tube designed specifically for cryptophotic reptiles, amphibians, and invertebrates — the shade dwellers, the crepuscular and nocturnal species that avoid direct sun but still require carefully calibrated UV exposure. Manufactured in Germany to a high quality standard, it delivers a rated UV output lifespan of 12 or more months, making it a dependable choice for keepers who need consistent, measurable performance.

Built for Shade-Dwelling Species

Cryptophotic animals — those adapted to low-light or indirect sun conditions — have UV requirements that are easy to get wrong. Too little UV and you risk deficiency; too much and you cause stress. This tube is formulated with a unique phosphor blend that replicates the UVA and UVB profile of filtered, natural solar radiation, delivering the right kind of output for species that would naturally seek dappled or concealed light rather than open basking.

UVA, UVB, and the Vitamin D3 Pathway

• UVB output supports healthy Vitamin D3 synthesis, which in turn drives calcium absorption and guards against Metabolic Bone Disease
• UVA stimulates natural behaviours including appetite, activity levels, and reproductive cycles
• Balanced visible light spectrum alongside UV output — not just UV alone
• Very High Output rating means UVB penetration exceeds that of standard T8 tubes and compact energy-saving alternatives

Performance in Taller Vivariums

The VHO output level gives this tube significantly stronger UVB penetration compared to conventional T8 or standard T5 equivalents, making it suitable for use in taller terrariums or enclosures fitted with mesh or screen tops that would otherwise reduce UV transmission. The intensity of UV received by the animal will still vary with distance from the tube, so positioning remains important.

Specifications

• Wattage: 24W
• Length: 22 inches
• UVB rating: UVB100 (3%)
• Tube type: T5 Very High Output (VHO)
• Origin: Germany
• Rated UV lifespan: 12+ months
• Product code: PT2381

For keepers housing nocturnal geckos, crepuscular amphibians, or invertebrates where UV provision is often underestimated, this tube offers a reliable, species-appropriate solution without compromising on output longevity.