The Centennial Light is the world’s longest-lasting light bulb. Housed at the Livermore-Pleasanton Fire Department in Livermore, California, the bulb was donated to the department in 1901. The longevity of the four-watt, carbon-filament, hand-blown bulb has been recognized by several sources, including Guinness World Records. It has reportedly only been turned off a handful of times, and it has been on continuously since it was switched off for 22 minutes in 1976 for what reason? Discuss