The Arcadia Reptile D3+ Reptile T5 Lamp 12% UVB Lamp is the replacement T5 tube for the Pro T5 UVB Kit and LumenIZE Pro T5 UVB Kit (sold separately). You can choose from 24 watts up to 54 watts. Arcadia D3+ Reptile T5 Lamp 12% has a greater output and better level of energy efficiency than the old T8 models. This Arcadia D3+ Reptile T5 Lamp 12% UVB range uses fluorescent tube technology to deliver a high amount of essential UVB light to your reptile, perfect for desert species that need around 12%. Arcadia Reptile D3 and D3+ T5 lamps have been specifically designed with animal health in mind. All of Arcadia's UVB percentages are measured as part of the total output of light from the lamp and after the all-important first 100 hours of output. By using Arcadia Reptile D3 and D3+ lamps that you are providing the very best in T5 technology for your beloved pet. The Arcadia Reptile D3 and D3+ UVB lamps are effective for one whole year to support your animal’s wellbeing. As full spectrum lamps, they help simulate sunlight, providing high color rendering to enhance your reptile’s appearance in their environment. The color temperature of 6,500K replicates typical daylight conditions.