Comfortable Indoor Lighting Conditions Evaluated from Psychological and Physiological Responses

Kakitsuba, Naoshi

doi:10.1080/15502724.2015.1061945

Cited by 28 publications

(24 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Perhaps one reason why so many Kruithof experiments are carried out is that-with just two easily controlled variables, illuminance and CCT-the experiments appear to be relatively easy, with the promise to find an apparently interesting result. For example, the recent study by Kakitsuba [2015] used test conditions and a procedure that was destined to demonstrate a Kruithoflike relationship between CCT and illuminance [Fotios 2016]. …”

Section: On the Abscissa The Reciprocal Value Of The Colour Temperatumentioning

confidence: 99%

A Revised Kruithof Graph Based on Empirical Data

Fotios

2016

LEUKOS

View full text Add to dashboard Cite

Kruithof's graph identifies combinations of illuminance and correlated color temperature (CCT) alleged to yield pleasing visual conditions for interior lighting. Though in research terms the support provided by Kruithof is insufficient, it is widely cited as a design rule and has been the focus of many experimental studies despite evidence against Kruithof since at least 1990. The current article examines the trends displayed in those studies considered to provide credible evidence: these do not support Kruithof. For pleasant conditions, these data suggest only avoiding low illuminances and do not favor any CCT.

show abstract

Section: On the Abscissa The Reciprocal Value Of The Colour Temperatumentioning

confidence: 99%

A Revised Kruithof Graph Based on Empirical Data

Fotios

2016

LEUKOS

View full text Add to dashboard Cite

show abstract

“…Colour preference has been reported to be impacted by several contextual factors which include the lighting application 19,21 , regional cultural difference [22][23][24] , illuminance level 25,26 and age difference 27 . Such research has contributed to the development of light quality evaluation but has also highlighted new problems.…”

Section: Introductionmentioning

confidence: 99%

“…Such a design may unpremeditatedly help to reveal the influence of other contextual factors on colour preference, since it relatively weakens the impact of light when compared to the conditions where CCT differs. However, unlike colour fidelity, colour preference should not be restricted by a reference light source, since in many cases people actually want to choose a favorite light irrespective of the CCT 4,26,[33][34][35][36][37] . Secondly, the experimental object is also an important concern.…”

Section: Introductionmentioning

confidence: 99%

Light dominates colour preference when correlated colour temperature differs

Huang

Liu

Westland

et al. 2017

Lighting Research & Technology

View full text Add to dashboard Cite

Colour preference of lighting is generally influenced by three kinds of contextual factors, which are the features of light, object and observer. In this study, a series of psychophysical experiments were conducted to investigate and compare the effect of certain factors on colour preference, including spectral power distribution of light, lighting application, observers' personal colour preference, regional cultural difference and gender difference. Certain LED lights with different correlated colour temperatures were used to illuminate a wide selection of objects. Participant response was quantified by a 7-point rating method or a 5-level ranking method. It was found that the preferred illumination for different objects exhibited a similar trend and the influence of light was significantly stronger than that of other factors. Therefore, we conclude that the light itself (rather than, for example, the objects that are viewed) is the most crucial factor for predicting which light, among several candidates with different CCTs, an observer will prefer. In addition, some of the gamut-based colour quality metrics correlated well with the participants' response, which corroborates the viewpoint that colour preference is strongly influenced by colour saturation. Moreover, the familiarity of the object affects the ratings for each experiment while the colour of the objects also influences colour preference.

show abstract

“…Category rating is widely used in studies related to lighting, including glare (De Boer and Schreuder 1967), brightness (Boyce and Cuttle 1990), the alleged Kruithof effect (Fotios 2017a;Kakitsuba 2016), the overall impression of road lighting (Simons et al 1987), visual clarity (Flynn and Spencer 1977;Vrabel et al 1998), and perceived safety (Boyce et al 2000). In a recent review of 70 studies investigating how changes in lamp spectral power distribution (SPD) affect spatial brightness, 30 used category rating; the remainder used either matching, adjustment, or discrimination procedures (Fotios et al 2015a).…”

Section: Introductionmentioning

confidence: 99%

Using Category Rating to Evaluate the Lit Environment: Is a Meaningful Opinion Captured?

Fotios

2018

LEUKOS

View full text Add to dashboard Cite

Do responses gained using category rating accurately reflect respondents' true evaluations of an item? "True" in this sense means that they have a real opinion about the issue, rather than being compelled by the survey to speculate an opinion, and that the strength of that opinion is faithfully captured. This article describes some common issues that suggest that it should not be simply assumed that a response gained using category rating reflects a true evaluation. That assumption requires an experiment to have been carefully designed and interpreted, and examples are shown where this is not the case. The article offers recommendations for good practice.

show abstract

Comfortable Indoor Lighting Conditions Evaluated from Psychological and Physiological Responses

Cited by 28 publications

References 22 publications

A Revised Kruithof Graph Based on Empirical Data

A Revised Kruithof Graph Based on Empirical Data

Light dominates colour preference when correlated colour temperature differs

Using Category Rating to Evaluate the Lit Environment: Is a Meaningful Opinion Captured?

Contact Info

Product

Resources

About