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This is the Centennial Light, the world's longest-lasting light bulb, burning since 1901. It is at 4550 East Avenue, Livermore, California and due to its longevity, the bulb has been noted by The Guinness Book of World Records. The Centennial Light was originally a 30-watt (or 60-watt) bulb, now very dim, emitting about the same light as a 4-watt nightlight. The hand-blown, carbon-filament common light bulb was invented by Adolphe Chaillet, a French engineer who filed a patent for this technology. Its unusual longevity was first noticed in 1972 by reporter Mike Dunstan. The bulb is cared for by the Centennial Light Bulb Committee, a partnership of the Livermore-Pleasanton Fire Department, Livermore Heritage Guild, Lawrence Livermore National Laboratories, and Sandia National Laboratories.