The Exo Terra Light Bracket is a light dome support fixture, allowing your light dome to suspend securely above your terrarium. This bracket can easily adjust to your desired height by moving the rubber washers. Adjusting the height allows you to regulate heat/light according to your terrarium environment requirements. This light bracket may suspend wire fixtures above any glass terrarium securely, as well as most other light domes. This bracket expands the life of light bulbs and prevents terrarium damage, making this Light Bracket highly recommended to any terrarium holder.