Hannelore Römich, Head of working group 'Research for Conservation' at Fraunhofer ISC Graham Martin, Head of Science, V&A Museum B. Lavedrine, Director of CRCDG M. Bacci, Head of Research, Istituto di Fisica Applicata "Nello Carrara" (IFAC)
Long or regular exposure to light, artificial or natural, may cause irreversible damage to valuable heritage objects. This damage may be visible, such as discolouration or fading, or result in a change of a mechanical property (e.g. brittleness of the historic material). It is known that the damage increases with the length of exposure and the intensity of lighting.