unilluminated vs unlighted

unilluminated and unlighted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unilluminated	No	Yes	No	No
unlighted	No	Yes	No	No

As adjectives, unilluminated and unlighted are synonyms defined as:

Other synonyms of unilluminated include lightless, unlit.

unilluminated (adjective)	unlighted (adjective)
without illumination	not set afire or burning
	without illumination