The Exo Terra Light Bracket is designed to suspend theExo Terra Light Dome or other types domes or wire fixtures above any Exo Terra Natural Terrarium or other glass terrarium securely. The Exo Terra Light Bracket easily adjusts to fit most types of fixtures or can be used to regulate heat/light according to required terrarium conditions by moving the rubber washers. Since the bulbs do not need to be moved after installation—together with increased ventilation—the light bulbs’ (basking lamps,Solar Glo, etc.) life span is drastically improved.