Reptizoo 2 In 1 Double Dome Lamp Fixture, 200wThe simple way to use both a heat lamp and UVB spot lamp in your terrarium Double lamp holder Use to hold your perfect combination of lighting and heat bulbs Helps reflect more beneficial rays into your terrarium Max 2 x 200w Independent power on off switches for each bulb Keeps Your Terrarium Organised. This double lamp holder is the ideal way to add both heat and light to your terrarium without cluttering up the environment with extra domes.