That irradiates. / That involves radiation.

The act of irradiating; emission of rays of light. / That which irradiates or is irradiated; lustre; splendour; brilliancy. / (physics) The radiant power received by unit area of surface

plural of irradiance

plural of irradiation

That radiates light

plural of irradiancy

A device used to irradiate.

Synonym of irradiance

An act of irradiating, or state of being irradiated. / (obsolete) illumination; irradiance; brilliance. / (obsolete, figuratively) mental light or illumination.

(transitive, literary, poetic) To illuminate; to brighten; to shine light on. / (transitive, literary, poetic) To enlighten intellectually; to illuminate.