Reptile Systems Zone 4 T5 550mm (22") 24W UVB Reptile Lamp

The RS Zone 4 T5 550mm (22") 24W is a high-output UVB fluorescent tube designed for reptile keepers who need serious UV performance in a standard T5 form factor. Built for species with demanding UVB requirements, this tube delivers over 12% UVB output to support vitamin D3 synthesis, making it a strong choice for desert and high-altitude species kept in UK vivariums and terrariums.

UVB & UVA Output

• Over 12% UVB — supports vitamin D3 synthesis in reptiles with higher UV requirements
• 30% UVA output — contributes to natural behaviour and visual wellbeing
• Extra high output classification — suited to Zone 4 UV index requirements

Colour Rendering

Beyond UV provision, this tube produces excellent natural colour rendition, allowing keepers to view their animals in accurate, true-to-life light. This is particularly relevant for species where colour observation is part of husbandry monitoring.

Compatibility & Installation

The RS Zone 4 T5 550mm operates only with equipment fitted with an appropriate T5 electronic ballast — it is not compatible with older magnetic ballast units. For best results, use with a dedicated T5 luminaire or electronic controller that matches the 24W rating and 550mm tube length.

Replacement Schedule

UV output degrades over time even when a tube still produces visible light. Replace this lamp after 12 months of normal use to ensure your animals continue to receive effective UVB levels throughout the year.

A straightforward, high-output T5 tube that covers the UV demands of more exacting species — use it correctly, replace it on schedule, and it does exactly what your animals need.