Guiding Light is an American television soap opera that is credited by the Guinness Book of World Records as the longest running drama in television and radio history, running from 1937 until 2009. It is also among the longest running broadcast programs in history of any kind, across radio media for 15 years, and then television media for 57 years, being first broadcast five days after President Franklin D. Roosevelt's second inauguration. The show's title refers to a lamp in the study of Reverend Dr. John Ruthledge, a major character when The Guiding Light debuted in 1937, that family and... residents could see as a sign for them to find help when needed. Guiding Light was created by Irna Phillips, and began as an NBC Radio serial on January 25, 1937. In June 2, 1947, the show moved to CBS radio, before starting on June 30, 1952, on CBS television. It would continue to air concomitantly on radio until June 29, 1956. The series was expanded from 15 minutes to a half hour in 1968, and then to a full hour on November 7, 1977. Guiding Light aired its 15,000th televised episode on September 6, 2006.
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| On the air: | January 25, 1937-September 18, 2009 |
| Network: | NBC, CBS |
| Writers: | William J. Bell, James E. Reilly, Victor Miller |
| Producer: | Jill Farren Phelps, Paul Rauch, John Conboy |