Towards a user preference model for interior lighting, Part 3: An alternative model

• Published in: Lighting research & technology (London, England : 2001) Vol. 52; no. 2; pp. 189 - 201
• Main Authors: Khanh, TQ, Bodrogi, P, Guo, X
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01-04-2020; Sage Publications Ltd
• Subjects: Color temperature; Illuminance; Independent variables; Light sources
• ISSN: 1477-1535; 1477-0938
• DOI: 10.1177/1477153519856056

In Parts 1 and 2 of this work, an experiment was described in which subjects assessed their visual impressions of scene brightness (B), visual clarity (VC), colour preference (CP) and scene preference (SP) in a real room. In this room, the horizontal illuminance (Ev), the correlated colour temperature (CCT) and the level of chroma enhancement caused by the spectrum of the light source (ΔC*) were changed systematically. In the present Part 3, these mean subjective B, VC, CP and SP scale values are re-analysed in terms of an alternative model based on a different set of independent variables: CCT, ΔC* and the circadian stimulus (CS). Contour map diagrams resulting from the new modelling equations are shown and compared with the conventional Kruithof-type representation.