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.
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References
1.
Khanh TQ, Bodrogi P, Guo X, Anh PQ. Towards a user preference model for interior lighting Part 1: Concept of the user preference model and experimental method. Lighting Research and Technology 2018. DOI 10.1177/1477153518816469.
2.
Khanh TQ, Bodrogi P, Guo X, Anh PQ. Towards a user preference model for interior lighting Part 2: Experimental results and modelling. Lighting Research and Technology 2018. DOI 10.1177/1477153518816474.
3.
ReaMSFigueiroMG. Light as a circadian stimulus for architectural lighting. Lighting Research and Technology2018; 50: 497–510.
4.
FigueiroMGSteversonBHeerwagenJKampschroerKHunterCMGonzalesKPlitnickBReaMS. The impact of daytime light exposures on sleep and mood in office workers. Sleep Health2017; 3: 204–215.
5.
FigueiroMGKalsherMSteversonBCHeerwagenJKampschroercKReaMS. Circadian-effective light and its impact on alertness in office workers. Lighting Research and Technology2019; 51: 171–183.
6.
RautkyläEPuolakkaMHalonenL. Alerting effects of daytime light exposure – a proposed link between light exposure and brain mechanisms. Lighting Research and Technology2012; 44: 238–252.
7.
FotiosSALevermoreGJ. Chromatic effect on apparent brightness in interior spaces, II: SWS lumens model. Lighting Research and Technology1998; 30: 103–106.
8.
KhanhTQBodrogiPVinhQTGuoXAnhTT. Colour preference, naturalness, vividness and colour quality metrics, Part 4: Experiments with still life arrangements at different correlated colour temperatures. Lighting Research and Technology2018; 50: 862–879.
9.
DavisWOhnoY. Color quality scale. Optical Engineering2010; 49: 033602–033602.
10.
KhanhTQBodrogiPVinhQTStojanovicD. Colour preference, naturalness, vividness and colour quality metrics - Part 1: Experiments in a real room. Lighting Research and Technology2016; 49: 697–713.
11.
BodrogiPLinYXiaoXStojanovicDKhanhTQ. Intercultural observer preference for perceived illumination chromaticity for different coloured object scenes. Lighting Research and Technology2015; 49: 305–315.
12.
Khanh TQ, Bodrogi P, Guo X, Vinh QT, Fischer S. Colour preference, naturalness, vividness and colour quality metrics, Part 5: A colour preference experiment at 2000 lx in a real room. Lighting Research and Technology 2019; 51: 262–279.
13.
KruithofAA. Tubular luminescence lamps for general illumination. Philips Technical Review1941; 6: 65–73.
14.
FotiosS. A revised Kruithof graph based on empirical data. Leukos2017; 13: 3–17.
15.
ViénotFDurandM-LMahlerE. Kruithof’s rule revisited using LED illumination. Journal of Modern Optics2009; 56: 1433–1446.
16.
Commission Internationale de l’Eclairage. CIE 212:2014 Guidance Towards Best Practice in Psychophysical Procedures Used When Measuring Relative Spatial Brightness. Vienna: CIE, 2014.
17.
Muck E, Bodmann HW. The importance of illumination level in visual activities in practice (in German: Die Bedeutung des Beleuchtungsniveaus bei praktischer Sehtätigkeit). Lichttechnik 1961; 13: 512.
18.
WesthoffJMHoremannHW. Contribution to Bodmann. Lichttechnik1963; 14: 24–24.
19.
Bodmann HW, Söllner G, Voit E. Assessment of illuminance levels for different types of illuminant (in German: Bewertung von Beleuchtungsniveaus bei verschiedenen Lichtarten): Proceedings of the CIE, Volume C, Vienna, 1963: pp. 502–509.
20.
BoycePR. The influence of illuminance level on prolonged work performance. Lighting Research and Technology1970; 2: 74–94.
21.
Juslen H. Lighting, productivity and preferred illuminances - field studies in the industrial environment. PhD thesis. Finland: Helsinki University of Technology, 2007.
Bodrogi P, Guo X, Khanh TQ. Colour surface rendering: a new aspect of light source colour quality for museum lighting: Proceedings of the 4th CIE Symposium on Colour and Visual Appearance, Prague, 5-7 September, 2016: pp. 198–207.
24.
RoyerMPHouserKWWilkersonAM. Color discrimination capability under highly structured spectra. Color Research and Application2012; 37: 441–449.
25.
HouserKW. The subjective response to linear fluorescent, direct/indirect lighting systems. Lighting Research and Technology2002; 34: 243–264.
