The Arcadia D3+ Reptile T5 Lamp 12% offers enhanced output and energy efficiency compared to older T8 models. Utilizing fluorescent tube technology, it delivers a high level of essential UVB light, ideal for desert species requiring around 12% UVB. Designed with animal health as a priority, Arcadia Reptile D3 and D3+ T5 lamps boast the world's highest output T5 lamps in 6% and 12% UVB. These percentages are measured after the initial 100 hours of use, ensuring reliable performance. The lamps are effective for a full year, keeping your reptile in optimal condition. As full-spectrum lamps, they simulate sunlight, providing high color rendering for better viewing of reptiles and their environment. The color temperature of 6,500K mimics typical daylight conditions. Specifically suited for desert reptiles like Bearded Dragons, this lamp provides the necessary UVB light for Vitamin D3 generation and calcium absorption, crucial for preventing metabolic bone disease. The lamp should be positioned 15-20 inches above the reptile and is best used with a T5 reflector for optimal light direction.