The Reptile One Internal Heat Lamp Holder is designed to provide a secure mounting point for your Heat Lamp on virtually any surface.The Internal Heat Lamp Holder is specially designed to be used with a Heat Lamp Dome Reflector, and is ideal for Lizards and Turtles. Internal placement of the Heat Lamp increases heating efficiency within the terrarium.Features & Benefits:Easy installation with new generation Reptile One TerrariumsSuitable for non Reptile One..