The Centennial Light is a remarkable and enduring testament to the longevity of early electrical engineering. Housed within the Fire Department of Livermore, California, this incandescent light bulb has captured the fascination of people around the world. What sets it apart is its astounding lifespan—burning continuously for over a century.

Installed in the Livermore-Pleasanton Fire Department’s hose cart house in 1901, the Centennial Light has defied the odds and countless advancements in lighting technology. Its simple design and sturdy construction have contributed to its remarkable endurance. It is a carbon-filament bulb, a technology that is largely obsolete in modern times due to its inefficiency. Yet, the Centennial Light has persisted, defying the very concept of planned obsolescence.

Throughout its more than 120 years of service, the bulb has been cared for by the fire department and local volunteers, becoming a symbol of both history and resilience. It has garnered attention from scientists, historians, and curious minds seeking to unravel the secrets behind its remarkable longevity.

The Centennial Light serves as a tangible link to the past, a living relic from a time when electricity was a burgeoning innovation. Its continuous glow is a reminder of the ingenuity and craftsmanship of the early days of electrical engineering, and it stands as a testament to the power of simplicity and durability. As the world continues to advance, the Centennial Light remains a steadfast presence, illuminating not only the firehouse but also the enduring spirit of human achievement.