The Palace Theater Light was made by the Shelby Electric Company[2] and has a carbon filament.
[3] It was installed on September 21, 1908, at the backstage of the Byers Opera House, and has been running since.
[3] The theater house was marked for demolition in 1977, and the light bulb went to the local home of a man.
[5][3] It appeared in the 1970 edition of the Guinness Book of World Records before it was replaced by the Centennial Light two years later when it was discovered to be older.
Speculators have suggested that it is because it does not get turned on and off, because it has a low wattage, or because it has less air inside due to how it was sealed.