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Human Centric Lighting
Published in Stan Walerczyk, Lighting & Controls: Transitioning to the Future, 2020
The Kruithof Effect (or Kruithof Curve) should be discussed, because some lighting professionals often use it to specify warm color tone lighting for low light levels. But the follow-up studies that I am aware of have not done a great job replicating the effect. You can judge for yourself. (See Figure 29-19.)
Change of Gamut Size for Producing Preferred Color Appearance from 20 to 15000 lux
Published in LEUKOS, 2021
The investigation on how light level should be considered when specifying light source CCT to create a pleasing environment has a long and ongoing history. Early in 1941, Kruithof carried out an experiment and proposed a graph (known as the Kruithof curve) to reveal the preferred combinations of illuminance and CCT (Kruithof 1941). Since then, many studies related to the Kruithof curve have been carried out and some aimed to better define the combinations of illuminance and CCT for specific lighting applications (e.g., museums and galleries; Boyce and Cuttle 1990; Davis and Ginthner 1990; Dikel et al. 2014; Fotios 2017; Han and Boyce 2003; Islam et al. 2015; Vienot et al. 2009; Wei et al. 2014b; Zhai et al. 2015).
Judging the Scientific Quality of Applied Lighting Research
Published in LEUKOS, 2019
Jennifer A. Veitch, Steve A. Fotios, Kevin W. Houser
We have chosen to use a very well-known paper as the basis for this presentation, Kruithof’s (1941) paper on tubular fluorescent lamps, in which he presented the “Kruithof curve” relating preferred light source color temperatures and illuminances. Many accept this curve as representing a fundamental truth; many others have attempted to replicate it (Boyce and Cuttle 1990; Davis and Ginthner 1990; Han and Boyce 2003; Vienot et al. 2009: see Fotios (2017) for a more extensive list) with varying degrees of success. Its familiarity and the fact that it is so widely accepted—probably by many who have not read the original—are key reasons for our choice of case study here.