Zilla's premium incandescent light fixtures are designed to deliver years of heat or light to reptile terrariums. 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 an Zilla Power Controller to automatically match on/off times to your pet's life cycle (sold separately.) Each Black Dome is packaged in an attention-getting nested box for easier shelf storage and maximized merchandizing appeal.