Although UV exposure is present at many workplaces, it has not gained much attention. Particularly with regard to UVA, the UV threshold limit values for acute effects used to date are insufficient, and there are no obligatory limits to prevent the sequels of chronic UV exposure. More precise threshold limit values have been published only preliminarily (DIN-Standard No. 5031, part 10). There is a need for regulations governing the supervision of occupational UV exposure and the individual protection of exposed persons.