The song is a story of a child's nightlight, told from the nightlight's point of view.
The Longines Symphonette is a hand-held pocket radio, manufactured in the 1960s. It is also a record label which specialized in releasing classic radio programs and multiple-record box sets.
The song's video was directed by Adam Bernstein and filmed inside the New York County's Surrogate's Court and Hall of Records building located at 31 Chambers Street in Manhattan. "I tell people it's my house." - Linnell
Blue Canary is the title of a 1953 song by Vincent Fiorino, which has lyrics on the sadder side about loneliness and comforting but has "happy" music. Also, the 1948 song "Bluebird of Happiness" as performed by Art Mooney (which reminds that, "Though you're deep in blue, you will see a ray of light creep through") may have influenced the line about a "bluebird of friendliness."
References to this song appear in the episode "Pigeon" of ABC's show Pushing Daises. You can view a clip here.