Vibration resistant filament for long life. 120V. For use in ceiling fans. Indoor. Life: 2000 hours. Lasts 1 year (Lasts 1 year under normal consumer use (4 hours average per day/ 7 days per week @ 120V). Lamp replacement is sole remedy available. Almost the same light output and lasts twice as long as a 60w, 1000 hr. bulb.). Standard base. Operate in any position. CSA listed. Made in USA.