Colour rendition and museum lighting

User menu

Publication Type:

Journal Article


Crawford, B.H.;


Studies in conservation, Volume 5, Number 2, p.41-51 (1960)


color, lighting, museums, rendering


The article is concerned with the manner in which the appearance of coloured objects is influenced by the lighting under which they are viewed. A method is described by which we can decide whether colour rendering is significantly different under daylight-imitating fluorescent tubes from what it is in daylight. The method also has other applications of this kind. From a large number of tests, Dr. Crawford has determined the tolerances of the most discriminating observer to changes in the colour of objects resulting from small changes in the illuminant. Using these tolerances, any illuminant purporting to imitate daylight can be given a "Figure of Merit," 100 being fully satisfactory. The Figure of Merit of the "colour-matching" ("north-light") fluorescent tube can only be raised to 100 by combining it with a calculated proportion of tungsten light. Garry Thomson