The Exo Terra Light Dome Aluminum UV Reflector Lamp for Reptile Terrarium is an aluminum light dome for terrarium bulbs Available in both 75 and 150 Watt options ranging from 5.5 to 7 inches in length. Features a reflective aluminum interior to maximize light and UV output and a ceramic socket for safety. Provided a broad light and heat dispersion. It’s ideal for use with mercury vapor bulbs or higher watt basking lamps, and includes an on/off switch for convenience. Available in Multiple Sizes or Wattage options