Ancor lamps are made with a heavy duty glass envelope for break resistance. Nickel-plated brass bases prevent corrosion while insuring a positive point-of-contact. Filaments with “rough service” design permit hours of reliable burning. Specifications System voltage: 12 V Design voltage: 13.50 V Amps: 4.17 A Watts: 50 W Life: 1000 hours Dimension: 2.34″ x 4.2″ Bulb trade number: 50A17/12 RoHS compliant (Restriction of Hazardous Substances Directive): Yes – compliant Dimensions