Higuchi JC 5521 - 50 Watt 24 Volt Halogen Bi-Pin Light Bulb, GY6.35 Base Base: GY6.35, 2 Pin (6.35 millimeters between pins) 50 Watts, 24 Volts Diameter: 10 millimeters (.39") Length: 44 millimeters (1.73") Life: 2000 Hours