luster vs radiance

luster and radiance both are nouns.

Word	Noun	Adjective	Verb	Adverb
luster	Yes	No	No	No
radiance	Yes	No	No	No

As nouns, radiance is a hypernym of luster; that is, radiance is a word with a broader meaning than luster:

Other hypernyms of luster include effulgence, radiancy, refulgence, refulgency, shine.

luster (noun)	radiance (noun)
a surface coating for ceramics or porcelain	the quality of being bright and sending out rays of light
a quality that outshines the usual	the amount of electromagnetic radiation leaving or arriving at a point on a surface
the visual property of something that shines with reflected light	an attractive combination of good health and happiness