Perko Spare Double Contact Bayonet Base Bulb For Navigation Lights 3/4" 12V 3/4in. This spare bulb is for a surface mount dome light. It is certified for use on power driven vessels under 20 meters in length. This Double Contact Bayonet Base Bulb model has a 3/4" diameter. The bulb features 12 volt 11 watt and 0.94 amp power output. Check manufacturer recommendations to ensure a proper fit. Features of Perko Spare Double Contact Bayonet Base Bulb For Navigation Lights 3/4" 12V Replacement bulbs with bayonet base for surface mount dome light Sold as package of two Certified for use on power driven vessels under 20 meters in length Bulb Diameter: 3/4" Nominal Voltage: 12 volts; Wattage: 11 watts; Amperage: 0.94 amps Package Contents: Perko Spare Double Contact Bayonet Base Bulb For Navigation Lights 3/4" 12V Perko 0337012DP: Spare Double Contact Bayonet Base Bulb For Navigation Lights 3/4" 12V 3/4in