Friday, October 23, 2026

Question: Livermore, recently named the top U.S. wine region, is also home to the world’s longest-burning light bulb. In roughly what year was it first switched on?

Answer: 1901. The “Centennial Light,” a hand-blown bulb at Livermore’s Fire Station No. 6, has glowed almost continuously for more than 120 years, long enough to earn a Guinness World Record as the longest-burning light bulb on Earth. It now shines at about 4 watts, like a dim night-light.