Onyx cylinder with die-cast base. Provides ambient and up-light. Mounts up only. Includes transformer and 12 volt, 50 watt halogen bi-pin lamp. Dimmable with standard incandescent dimmer. This product can mount to either a 4 inch square electrical box with round plaster ring or an octagonal electrical box (not included). Dimmable with a standard incandescent dimmer (not included).