Miniature Incandescent Bulb, Trade Number 28PSB, Bulb Shape T2, Bulb Base Type Tel. Slide No. 5, 28 Voltage, Telephone, 1. 0 Watts, 40mA Bulb Amps, Average Bulb Life 5000 hr. , Light Color Clear, Max. Overall Bulb Length 1-7/64 In. , Light Bulb Dia. 5/8 In. , Bulb Housing Glass, Indoor Only, Standards Meets 2012 Lighting Legislation Energy, Package Quantity 10