Longest-lasting light bulbs

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This is a list of the longest lasting incandescent light bulbs. Before the development of LED light bulbs, which have very long lifespans, incandescent bulbs that lasted more than a few years were quite uncommon and attracted significant media attention.

The world's longest lasting light bulb is the Centennial Light at 4550 East Ave., Livermore, CA. It is maintained by the Livermore-Pleasanton Fire Department. The fire department says the bulb is at least 111 years old and has only been turned off a handful of times. The bulb has been noted by "The Guinness Book of World Records," Ripley's Believe It or Not!, and General Electric as being the world's longest-lasting light bulb ...

While it might seem astonishing that so many longest-lasting light bulbs have been so infrequently turned off, this is the precise reason for their longevity. Most of the wear and tear that leads to burnouts in incandescent light bulbs is caused by turning them on and off, not by burning them. Each time the bulb is turned on and off, the filament is heated and cooled. This causes the material of the filament to expand and contract, in turn causing tiny stress cracks to develop.

The more the light is turned on and off, the larger these cracks grow, until eventually the filament breaks at some point, causing the light to burn out.[citation needed] Another reason for the longevity of bulbs is the size and quality of the filament.


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Second longest-lasting light bulb:

The second longest-lasting light bulb is in Fort Worth, Texas. The bulb, known as the Eternal Light, was credited as being the longest-lasting bulb in the 1970 edition of the The Guinness Book of World Records, two years before the discovery of the Livermore bulb.

It was originally at the Byers Opera House, and was installed by a stage-hand, Barry Burke, on Sept. 21, 1908, above the backstage door. he theater was demolished in 1977 and the bulb was transported to a museum located in the Livestock Exchange Building. Since its installation in the museum, it has only been turned off once -- by accident -- before being put on its own, unswitched, circuit.

There is another working 1908 lightbulb in Norway, in the "Kongevognen"(King's wagon) from Thamshavnsbanen railway in Trøndelag, Norway. The bulb is one of the original bulbs of the wagon that was ordered built by Christian Thams in 1908, and was delivered by the Edison factory in the United States. The wagon is now part of a museum, and the light bulb is in use several times per week.

Third longest-lasting light bulb:

The third longest-lasting light bulb was above the back door of Gasnick Supply, a New York City hardware store on Second Avenue, between 52nd and 53rd Streets. It was installed in 1912, according to store owner Jack Gasnick.

Apparently Gasnick tried several times to discredit the Centennial Light in Livermore. In 1981 he wrote to Dear Abby and claimed that the Livermore bulb had burned out, although it had not. In 1983, he wrote to Guinness and claimed that the Livermore bulb was a fraud. In his opinion as a trained electrical technician, the socket for the bulb was incorrect for its age, he said. He also pointed out that there were no carbon deposits on the inside of the glass, unlike his bulb, which was filthy. He then declared his bulb to be the world's oldest, seemingly unaware of the bulb in Fort Worth.

It is not known what happened to Gasnick and his bulb. The store, and the entire half-block on which it stood, were torn down in 2003.

The fourth longest-lasting light bulb:

The Mangum Light Bulb is located in the firehouse in Mangum, Oklahoma. It is located in a fire house in Mangum. The bulb is not attached to any special electrical supply, and when the power goes off, so does the bulb. The firefighters in Mangum are willing to show people the bulb as long as they're not busy with something else.

Fifth longest-lasting light bulb:

The fifth longest-lasting light bulb was in a washroom at the Martin & Newby Electrical Shop in Ipswich, England. Given its shape and design, it was thought to date from the 1930s. It burned out in January 2001.