ray of light vs sunbeam

ray of light and sunbeam both are nouns.

Word	Noun	Adjective	Verb	Adverb
ray of light	Yes	No	No	No
sunbeam	Yes	No	No	No

As nouns, sunbeam is a hyponym of ray of light; that is, sunbeam is a word with a more specific, narrower meaning than ray of light:

Other hyponyms of ray of light include heat ray, high beam, moon-ray, moon ray, moonbeam, sunray, laser beam, low beam.

ray of light (noun)	sunbeam (noun)
a column of light (as from a beacon)	a ray of sunlight