A light bulb that dangles above emergency trucks at Fire Station No. 6 in Livermore, California, has been on almost continuously for 109 years. Known as the 'Centennial Light,' it was designed in the 1890s by Adolphe Chailet, a competitor of Thomas Edison, and manufactured by the Shelby Electric Company of Ohio. See the lamp burning live on BulbCam, and read more about it at Mail Online.