[(10 Pack) 50 Watt MR16 GE ConstantColor Halogen Light Bulb / 40 Degree Beam Spread / 12 Volt / GX5.3 Base] 10 Pack Base: 2-Pin, GX5.3 (5.3 millimeters between pins) EXN ANSI Code: 50 Watts, 12 Volts, 40 Degree Beam Spread Shape: MR16 (2" Diameter, 1 7/8" Length) Life: 5000-6000 Hours