Something that illuminates.

That illuminates.

plural of illuminant

The act of illuminating, or supplying with light; the state of being illuminated. / Festive decoration of houses or buildings with lights.

(transitive) To shine light on something. / (transitive) To decorate something with lights. / (transitive, figuratively) To clarify or make something understandable.

Someone thought to have an unusual degree of enlightenment.

(obsolete) enlightened

of, capable of, or causing illumination

Irradiated by light, lit. / (of a manuscript) Decorated and illustrated.

simple past tense and past participle of illuminate