ultraviolet light vs ultraviolet illumination

ultraviolet light and ultraviolet illumination both are nouns.

Word	Noun	Adjective	Verb	Adverb
ultraviolet light	Yes	No	No	No
ultraviolet illumination	Yes	No	No	No

As nouns, ultraviolet light and ultraviolet illumination are synonyms defined as:

ultraviolet light and ultraviolet illumination: radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays

Other synonyms of ultraviolet light include ultraviolet, ultraviolet radiation, UV.

ultraviolet light (noun)	ultraviolet illumination (noun)
radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays	radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays