Abstract: A light source. The light source includes as components which superimpose one another in this sequence: a first light-emitting semiconductor component; a first carrier element comprising a first carrier surface which faces the first light-emitting semiconductor component and a first cooling surface deliminating at least in part a first fluid path; and a distributor element comprising a first cavity and a further cavity. The first cavity and the further cavity are fluidically connected to one another by the first fluid path. Also disclosed are a printing machine; methods, in particular for producing a printed product, for irradiating a material to be irradiated, and for producing a light source; corresponding method products; an assembly having the light source; and uses of the light source.