Ushio 1000407 - EXN/S, REFLEKTO SILVER - Superline Reflecto 50 Watt 12 Volt MR16 Flood Halogen Light Bulb, Silver 50 Watt, 12 Volt, 36 Degree Beam Spread (EXN) Shape: MR16 (2" Diameter, 1.78" Length) Base: GU5.3 (5.3 millimeters between pins) Life: 3500 Hours Silver Backing Prevents Light From Escaping Rear of Bulb