lambency vs refulgency

lambency and refulgency both are nouns.

Word	Noun	Adjective	Verb	Adverb
lambency	Yes	No	No	No
refulgency	Yes	No	No	No

As nouns, refulgency is a hypernym of lambency; that is, refulgency is a word with a broader meaning than lambency:

Other hypernyms of lambency include effulgence, radiance, radiancy, refulgence, shine.

lambency (noun)	refulgency (noun)
an appearance of reflected light	the quality of being bright and sending out rays of light