The arrangement comprises a visible light sensor arrangement for determining the illumination level of the visible light partitioned by wavelength ranges. An ultraviolet sensor is provided for determining the illumination level of ultraviolet radiation, particularly from the ultraviolet-wavelength ranges. Independent claims are also included for the following: (1) a lighting arrangement for radiosensitive exhibited articles in museums or exhibitions; and (2) a method for avoiding or decreasing the damage of radiosensitive exhibited articles, particularly in exhibitions or museums.
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