Exo Terra Reptile UVB100 T5 VHO 54W 46" Tube | PT2383

The ET Reptile UVB100 T5 VHO is a 54W, 46-inch Very High Output fluorescent tube designed specifically for reptiles, amphibians, and invertebrates living in the cryptophotic zone — the shade-dwelling species that avoid direct sunlight but still require meaningful UV exposure to thrive. Manufactured in Germany to a high quality standard, this tube delivers a UVB output rated to last 12 months or more, making it a reliable long-term fixture in any vivarium setup.

Designed for Cryptophotic Species

Shade dwellers — including many nocturnal and crepuscular reptiles — have evolved to receive low, filtered, or incidental UV rather than intense direct sunlight. The UVB100 designation reflects a UV index appropriate for these animals, providing the physiological benefits of UV radiation without the intensity suited to desert-dwelling baskers. UVA output supports natural behaviours including appetite, activity, and reproductive cycles, while UVB drives Vitamin D3 synthesis and calcium metabolism.

UVB That Works Where It Matters

The Very High Output (VHO) format produces significantly stronger UVA and UVB emissions than standard T8 tubes or compact energy-saving alternatives. Enhanced UVB penetration means the tube remains effective across greater distances from the basking area, making it well-suited to taller terrariums or enclosures fitted with mesh screens that would otherwise reduce UV transmission.

Vitamin D3, Calcium, and MBD Prevention

• Promotes healthy Vitamin D3 synthesis through UVB exposure
• Supports calcium absorption to maintain strong bone structure
• Helps guard against Metabolic Bone Disease (MBD) — a serious risk in UV-deprived reptiles
• UVA stimulates natural feeding, activity, and breeding behaviour
• Unique phosphor blend replicates the solar UVB spectrum

Specifications

• Wattage: 54W
• Length: 46 inches
• Format: T5 Very High Output (VHO)
• UVB rating: UVB100 (3%)
• Rated UV output lifespan: 12+ months
• Country of manufacture: Germany
• Compatible with T5 terrarium canopy fixtures

For keepers housing cryptophotic species who want dependable, long-lasting UV output without compromising on quality, the ET Reptile UVB100 T5 VHO 54W delivers the spectral accuracy and penetration depth that serious reptile husbandry demands.