at first there is the centennial light which is burning its 110th year this year, and has only been switched off a handful of times. One can find said light in the fire station in Livermore California.
Secondly, in Fort Worth, Texas the Eternal Light, can be found. It was credited as being the longest-lasting bulb in the 1970 edition of the Guinness Book of World Records, two years before the discovery of the Livermore bulb. It was originally at the Byers Opera House, and was installed by a stagehand, Barry Burke, on September 21, 1908, above the backstage door. The theatre was demolished in 1977 and the bulb was transported to a museum located in the Livestock Exchange Building. Since its installation in the museum, it has only been turned off once — by accident — before being put on its own, unswitched, circuit.
Thirdly, the light that used to be at the back door of Gasnick Supply, a New York City hardware store. The owner has tried and failed to discredit the centennial light, saying that it is too clean to justify its age. It is not known what happened to Gasnick and his bulb. The store, and the entire half-block on which it stood, were torn down in 2003 to make room for a 31-story tower of million-dollar condominiums.