A Fire Station at 4550 East Avenue Livermore in California, guards a special light bulb; a centennial light bulb that has been shining continuously since 1901. The bulb has been turned off just several times during its lifetime. It has been maintained by the Livermore-Pleasanton Fire Department for the last 40 years where it was relocated from the 2 miles away old fire department. During its relocation the bulb was off for 22 minutes, which was the longest time it had ever been deprived of power.
This Centennial light bulb is officially listed in the Guinness Book of World Records, Ripley’s Believe It or Not, and General Electric, who all agree that it is the longest-lasting bulb in the world.
The Centennial bulb was produced by Shelby; a company whose central focus was the durability of their products. The bulb’s longevity has been attributed to its low wattage, its perfect seal, not being turned off and on, and dedicated power supply.
Source via: centennialbulb.org