display vs light show

display and light show both are nouns.

Word	Noun	Adjective	Verb	Adverb
display	Yes	No	Yes	No
light show	Yes	No	No	No

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

Other hyponyms of display include parade.

display (noun)	light show (noun)
something shown to the public	a display of colored lights moving in shifting patterns
a visual representation of something
an electronic device that represents information in visual form
exhibiting openly in public view
something intended to communicate a particular impression
behavior that makes your feelings public

display (verb)	light show (verb)
to show, make visible or apparent
attract attention by displaying some body part or posing; of animals