Zilla Slimline Tropical 25 UVB Fixture includes an 18" T8 Tropical UV fluorescent lamp. These fixtures offer high-quality fluorescent lighting in a convenient, ready-to-use fixture. Energy efficient electronic ballast High-quality fluorescent lighting in a convenient, ready-to-use fixture Easy to install and suitable for applications where space is limited Its compact and lightweight design makes it easy to install and suitable for applications where space is limited. The Tropical 25 lamp simulates natural daylight while producing 25 microwatts of UVB to promote proper calcium absorption and bone growth in reptiles. The fixtures acrylic lens protects the lamp and wiring. Ideal for Anoles, Day Geckos, Tokay Geckos, Iguanas, Basilisks, Chameleons, Chinese Water Dragons, Tegus, Red-eared Sliders, Red Food Tortoises and Eastern Box Turtles. Slimline Fixtures offer high-quality fluorescent lighting in compact, lightweight, convenient and ready-to-use units. They feature a slim profile of 18"L x 4"W x 1"H making them suitable for applications where space is limited.