The 120 year old light bulb that never been turned off.

Light bulb that never been turned off since 1901.
ivermore's Centennial Light Bulb

The Centennial Light is the world's longest-lasting light bulb, burning since 1901, and almost never switched off. Due to its longevity, the bulb has been noted by The Guinness Book of World Records, Ripley's Believe It or Not!, and General Electric. 

The Centennial Light was originally a 30-watt(or 60-watt) bulb, but is now very dim, emitting about the same light as a 4-watt nightlight. The hand-blown, carbon-filament common light bulb was manufactured in Shelby, Ohio, by the Shelby Electric Company in the late 1890s and was invented by Adolphe A. Chaillet.

The hand-blown, carbon-filament common light bulb was invented by Adolphe Chaillet, a French engineer who filed a patent for this technology. It was manufactured in Shelby, Ohio, by the Shelby Electric Company in the late 1890s; many just like it still exist and can be found functioning. According to Zylpha Bernal Beck, the bulb was donated to the Fire Department by her father, Dennis Bernal, in 1901. Bernal owned the Livermore Power and Water Company and donated the bulb to the fire station when he sold the company. That story has been supported by firefighter volunteers of that era.

Evidence suggests that the bulb has hung in at least four locations. It was originally hung in 1901 in a hose cart house on L Street, then moved to a garage in downtown Livermore used by the fire and police departments. When the fire department consolidated, it was moved again to a newly constructed City Hall that housed the unified department.

Watch video -->The oldest continually running lightbulb in the world - Livermore's Centennial Light Bulb.

LIVERMORE, Calif. — Behind the garage doors of the Livermore Fire Station, there’s a highly visited and highly revered tourist attraction.
Inside the visitor's book, you’ll find tourists have traveled from Germany, Japan and Canada to see the world’s oldest burning lightbulb.

 
The Livermore lightbulb became the Centennial Lightbulb in 2001. In 2015, it officially burned over one million hours. It didn’t get a formal birthday this year because of the pandemic, but you can watch it glow on the Centennial Lightbulbs web camera 24 hours a day.
During its long and illustrious life, the Centennial Light has been ‘off’ on several occasions but that has been due to human error or intervention and not the bulb itself, which has never ‘burned out’ or ceased function.

Source: Few websites, Wikipedia...