The Exo Terra Reptile Dome Has An Extra Long Aluminium Reflector Dome That Extends Beyond The Face Of Most Bulbs. The Fixture Gives You The Versatility Of Placing Heat And/Or Light Sources On Your Terrarium Where Needed. The Aluminium Reflector Increases The Light, Uva And Uvb Output Significantly! It'S Heat Resistant Ceramic Socket Can Accomodate Either Compact Fluorescent Bulbs Or Incadescent Bulbs. The Light Can Be Easily Turned On And Off By The Switch Which Is Mounted On An Extra Long Power Cord. Combine Multiple Fixtures With Specific Light Bulbs To Create The Ideal Lighting System.