Polarity:bi-polar,e10 miniature base compatible with 10 to 30 Volt,plug and play for fixtures powered by DC/AC 12V 14V and DC18V 24V 28Vpower supply (NOTE: Voltage above 18V, JUST FOR DC, CAN NOT FOR AC), wide range of use miniature wedge sockets,very nice replacements for an incandescent bulb E10 led wedge base 1487 light bulb works great on Lionel and Marx vintage electric train locomotives,vintage stereo console,toy car, miniature dollhouses,electronic tester,Instrument Indicator Lights E10 1487 bulb also can replace House address light bulb in original filament-style bulbs in lighted address plaques, landscape lighting, house lighting,replace older flashlight bulb and other low voltage lights 1446 1447 bulb compare to the halogen lamp,this Led Bulb Lower energy consumption,output bright and soft lighting,waterproof design long life worked perfectly for replacement bulbs Warranty: ONE YEAR (Replacement or Refund).Package Included:2Pack of 1447 1447 1449 bulbs e10 Miniature Bayonet Led Bulb Warm White Bulb Socket: 1446 1447 1487 Voltage: DC/AC 10V-30V Color: White 6000K Lumen: 150lumens Polarity: bi-polar Application: 1.E10 led wedge base bulbs works great on Lionel and Marx vintage electric train locomotives,vintage stereo console,miniature dollhouses,Instrument Indicator Lights, electronic tester 2.Replace address light bulb, original filament-style bulbs in lighted address plaques, landscape lighting, house lighting,older flashlights and other low voltage lights Package Included: 2Pack of 1447 1447 bulbs e10 bulb white