This unfinished brass golf cup light set works with one 20-watt halogen bulb, with 1 1/2" stamped brass golf cup holder bracket. It has a high impact clear tempered convex lens insert, the socket is high temperature ceramic GU5.3 bi-pin with 250oC silicone wire, features 16/2 lead wire, includes 4 1/2" white PVC sleeve. For all low voltage (12 volts) outdoor fixtures a transformer is required. Use of an FA-05 quick connector is highly recommended by the manufacturer. Goes great with our MegaGolf artificial grass.