guiding light vs leading light

guiding light and leading light both are nouns.

Word	Noun	Adjective	Verb	Adverb
guiding light	Yes	No	No	No
leading light	Yes	No	No	No

As nouns, guiding light and leading light are synonyms defined as:

guiding light and leading light: a celebrity who is an inspiration to others

Other synonyms of guiding light include luminary, notability, notable.

guiding light (noun)	leading light (noun)
a celebrity who is an inspiration to others	a celebrity who is an inspiration to others