(4 Pack)-GE EXN 20833-MR 16 Lamp w/ Constant Color Coating, 12V 50W 40 Degree Beam EXN ANSI Code: 50 Watts, 12 Volts, 40 Degree Beam Spread Shape: MR16 (2" Diameter, 1 7/8" Length) Open Face, Narrow Flood Base: 2-Pin, GX5.3 (5.3 millimeters between pins) Life: 5000-6000 Hours Four Bulbs per Order.