AICCM Symposium 2006, Conservation of Paper, Books and Photographic Materials. Post-prints and Posters. 19-21 April 2006, Wellington, New Zealand
This paper reports on progress in a series of research investigations aimed at reducing the exposure of museum objects to damaging radiation while maintaining illumination levels. Not all wavelengths of light are equally important for colour rendering, and by concentrating radiant power into the wavebands that are most important it is possible to generate spectral power distributions (SPDs) that can provide a given illuminance with good colour rendering, while subjecting the receiving surface to relatively low irradiance. This research seeks to address the questions: What are the critical wavebands? What SPDs offer the greatest potential for reduced irradiance? How do viewers respond to museum displays illuminated with this type of lighting? To what extent can the potential for reduced exposure be achieved in practice?