Kruithof's rule revisited using LED illumination

We have investigated the effect of colour temperature and illuminance on the visual response. Since Kruithof's (1941) work on general illumination, it has been proposed that users would find 'pleasing' high correlated colour temperature (CCT) illumination at high illuminance and low C...

Full description

Saved in:
Bibliographic Details
Published in:Journal of modern optics 2009-07, Vol.56 (13), p.1433-1446
Main Authors: Viénot, Françoise, Durand, Marie-Lucie, Mahler, Elodie
Format: Article
Language:English
Subjects:
brightness
Color
Correlation analysis
Effects
Kruithof
Light
light emitting diodes
lighting
melanopsin
Temperature
visual performance
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have investigated the effect of colour temperature and illuminance on the visual response. Since Kruithof's (1941) work on general illumination, it has been proposed that users would find 'pleasing' high correlated colour temperature (CCT) illumination at high illuminance and low CCT illumination at low illuminance, although it is not unanimously accepted. Here, we question whether the pleasing sensation comes from facilitation of visual performance or from subjective appraisal. We have conducted experiments at various illuminance levels and various CCTs including performance tasks and subjective scaling of illumination quality. The change of illumination was obtained using adjustable LED clusters with high colour rendering index (R a > 90). Whereas the performance tasks yield results which depend on luminance and only slightly on CCT, observers reported that high CCT illuminations look brighter than low CCT illuminations. We investigate the effect of the various spectral power distributions on the intrinsically photoreceptive retinal ganglion cells and on the pupil response.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340903151278