The Centennial Light: California's 125-Year-Old Bulb Still Burning Strong, Holds World Record

A lightbulb that has been burning for more than a century is still glowing inside a California fire station. This summer, it will mark an extraordinary 125 years of continuous illumination. The Centennial Light has been burning almost continuously since 1901 at Fire Station No. 6 in Livermore, a city of about 90,000 residents. Its survival has made it one of Northern California's most unlikely attractions. Guinness World Records recognized it as the longest-burning lightbulb in the world.

Now emitting just four watts, the bulb has been switched off only a handful of times in over a century. Most interruptions occurred during firehouse relocations. Its most recent outage in 2013 was traced to a drained generator battery, not a failure of the bulb itself. Visitors from around the world have flocked to see it. The light has even appeared in a children's book. For firefighters, however, the glow is simply part of daily life.

No one knows exactly why the Centennial Light has lasted so long. Its survival is widely credited to its construction. The bulb was manufactured in 1897 by the Shelby Electric Company of Ohio. French inventor Adolphe Chaillet engineered it. Unlike modern bulbs, this one was built with an unusually thick filament. Retired deputy fire chief Tom Bramell, its custodian, explained that the filament was made from processed cellulose heated until it carbonized. This created a dense, durable core capable of withstanding long-term burning.

Shelby tested its bulbs in endurance trials. They were pitted against competitors' products. While rival bulbs failed, the Shelby bulb outlasted them all. Chaillet promoted his design as longer lasting and more efficient. The bulbs sold well, but production stopped in 1912 after General Electric absorbed the company. By 1901, the bulb had already proven its staying power.

The bulb was donated by Dennis Bernal, a local utility owner. It was installed at a volunteer fire station on Second Street. Firefighters kept it on around the clock. The light accompanied the department through a move to a new fire station and town hall in 1906. It was briefly switched off during the transfer, though no records detail how long it remained dark.

In 1971, the Livermore Herald News investigated local rumors about a lightbulb burning for generations. The story helped propel the bulb's fame. Guinness later confirmed it as a world record holder. What makes this bulb so different? Its design, materials, and the careful stewardship of those who have maintained it. Each detail contributes to its remarkable story of endurance.

The bulb now hangs inside Fire Station No. 6 in Livermore. It has survived multiple relocations and decades of technological change. Its glow is a quiet testament to engineering from the late 19th century. For visitors, it is a marvel. For firefighters, it is a fixture. Its future remains as uncertain as its past, but its light continues to shine.

What might the bulb's future hold? Will it burn for another century? Or will it finally flicker out? The answer remains unknown. For now, the Centennial Light continues its work, illuminating a corner of history for all who pass through Fire Station No. 6.