Reptile Systems Zone 3 T5 UVB Lamp

The Reptile Systems Zone 3 T5 is a high-output UVB fluorescent lamp designed for reptiles requiring strong UV exposure. Available in four sizes to suit vivarium setups of different scales, this tube delivers 12% UVB and 30% UVA output — figures that place it firmly in the higher end of the T5 fluorescent range and make it appropriate for species from more intense UV environments.

UVB and UVA Output

With 12% UVB, this lamp supports the synthesis of vitamin D3, which is essential for calcium metabolism and long-term bone health in reptiles. The 30% UVA output contributes to natural behaviour and colour perception, aspects of reptile welfare that lower-output lamps often overlook. Natural colour rendering is also a strength of this tube, making your animals look as they should under good lighting.

T5 Technology

These are T5 fluorescent tubes, which means they require a compatible T5 electronic ballast to operate — they will not run on older magnetic ballast fittings. For best results, use with a dedicated T5 luminaire or electronic controller designed for T5 lamps. The extra-high output format of T5 technology allows effective UV penetration across a greater distance than standard T8 tubes, giving more flexibility in enclosure design.

Replacement and Maintenance

UVB output degrades over time even when a tube still appears to produce visible light. Reptile Systems recommend replacing this lamp after one year of normal use to ensure your animals continue to receive adequate UV exposure. Building a replacement schedule into your husbandry routine is straightforward and keeps UV provision consistent.

Choosing the Right Size

The Zone 3 T5 is available in four sizes, ranging from a compact option suited to smaller or supplementary setups through to a full-length tube for large vivaria. Select the size that best matches the internal length of your enclosure and the positioning of your T5 fixture. Pairing the correct tube length with an appropriately sized luminaire gives the most consistent UV spread across the basking zone.