Light Dome Hanging Bracket – Light Dome or Wire Light Hanging Bracket – Easily Adjustable – Extends Bulb Life – Securely Suspends Most Fixtures – Helps Prevent Accidental Tipping – Prevents Damage to Terrarium. The Exo Terra Light Dome Hanging Bracket is designed to securely suspend the Exo Terra Light Dome (#PT2055, PT2057) or other types of domes or wire lights over any Exo Terra Naturalistic Terrarium or other glass terrarium. The Exo Terra Light Dome Hanging Bracket easily adjusts to fit most types of fixtures or can be used to regulate heat/light according to the terrarium's requirements by moving the rubber washers. Because the bulbs do not need to be moved after installation—with increased ventilation—the lifespan of the bulbs (heat lamps, Solar Glo, etc.) is significantly improved.