Good looks, great long-term comfort for reptile pets. Zilla's premium incandescent light fixtures are designed to deliver years of heat or light to reptile terrariums. Each of three sizes is topped with a ceramic socket to withstand constant heat. Sockets for the 8.5" and 10" fixtures accept bulbs to 250 watts. The black exterior finish is powder coated and fired for added luster and long life. An in-line on/off switch is positioned near the fixture for easy use. Add a Zilla Power Controller to automatically match on/off times to your pet's life cycle (sold separately).