Miniature Incandescent Bulb, Trade Number 7440, Bulb Shape T6-1/2, Bulb Base Type Glass Wedge (W3x16d), 12 Voltage, General Purpose, 21 Watts, 1850mA Bulb Amps, Average Bulb Life 300 hr. , 466 Lumens, Max. Overall Bulb Length 1-27/32 In. , Light Bulb Dia. 3/4 In. , Bulb Housing Glass, Indoor Only, Standards Meets 2012 Lighting Legislation Energy, Package Quantity 10