A California firehouse light bulb, burning since 1901, continues to shine after 124 years thanks to durable craftsmanship and low, steady power use.
A light bulb in Livermore, California, has been glowing almost continuously since 1901, earning recognition from Guinness World Records as the longest-burning bulb in history. Known as the Centennial Light, it was first installed in the city’s fire station and has since illuminated six generations of firefighters.
Originally rated at 60 watts, the bulb now runs at just 4 watts, casting a dim orange glow. Designed by French engineer Adolphe Chaillet and manufactured by Shelby Electric Company in the late 1890s, it was crafted with hand-blown glass, a thick carbon filament, and a nitrogen atmosphere—features credited for its remarkable longevity.
The Centennial Light has survived power outages, relocations, and in 2015 marked its millionth hour of illumination. It even has a live webcam for admirers who check in daily. Firefighters treat it as their oldest crew member, once escorting it with full honors during a station move in 1976.