A light bulb in a firehouse in Livermore, California, which has been declared the oldest known working light bulb by the Guinness Book of World Records, will celebrate its 110th anniversary on June 18.

The bulb, which was designed by Edison competitor Adolphe Chaillet, has been glowing since it was installed in 1901 with the exception of a brief period in 1903, a week in 1937, and some power outages between then and 1976.

The bulb has lasted for 110 years, while the average hardware store light bulb lasts only 1,000 hours.

Nobody knows how it's possible. It is a 60-watt bulb and it's only turned on for about four watts, but nobody knows why it keeps burning.” said Lynn Owens, in charge of the light bulb centennial committee, Time.com reported.

We've had scientists from all over the country look at this light bulb,” Owens said