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12V, 50W MR16 halogen projector bulb. It features a GU5.3/GX5.3 bi-pin base and a very narrow 12-degree spot beam spread, maximizing focused light delivery - ANSI Code: EXTVoltage: 12 VoltsWattage: 50 WattsBase Type: GU5.3 / GX5.3 (2-pin, 5.3 mm pin spacing)Bulb Shape: MR16 (2-inch diameter multi-mirror reflector)Beam Angle: 12° Narrow Spot (SP)Filament Type: Axial (for precise optical alignment)