Guiding Light (known as The Guiding Light before 1975) is an American television soap opera that is listed in Guinness World Records as the longest-running drama in television in American history, broadcast on CBS for 57 years from June 30, 1952 until September 18, 2009, preceded by a 15-year broadcast on radio.Guiding Light is the longest running soap opera and the fifth longest running program in all of broadcast history