Influence of Air Temperature on Preference for Color Temperature of General Lighting in the Room

Nakamura, Hajimu; Oki, Masato

doi:10.1618/jhes.4.41

Cited by 18 publications

(17 citation statements)

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“…The preferred light color also depended on the ambient temperature; for the cool conditions, participants preferred a lower CCT compared to the warm conditions. Similar results were obtained in the study of Nakamura et al, where participants rated the low CCT as most comfortable during the lowest temperature, while the highest CCT was most comfortable during the high temperature . Although the hue‐heat hypothesis was not confirmed in this study, the ambient temperature did affect the apparent warmth of light.…”

Section: Discussionsupporting

confidence: 84%

Interactions between the perception of light and temperature

2018

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Expanding the acceptable range of indoor temperatures allows to reduce building energy consumption and may be beneficial for health. Therefore, we explored whether light conditions can be used to influence thermal perception under various ambient temperatures. In two laboratory experiments, we tested the effect of the correlated color temperature of light (2700 K and 5800 K) and its intensity (5 and 1200 lux) on thermal perception. The light exposures were provided during cool, neutral, and warm thermal conditions. Cold-induced perceived shivering was higher for the 5800 K light exposure. All other parameters related to thermal perception did not significantly differ between the light exposures. Interestingly, the other way around, an increasing ambient temperature resulted in a warmer perception of the light color. In every light condition, it appeared that the perceived light intensity was closest to neutral under the thermoneutral condition. Between different light sessions, the change in visual comfort and the change in thermal comfort were positively related. The main conclusion therefore is that thermal discomfort can be partly compensated by lighting that results in a higher perceived visual comfort. Field studies are required to demonstrate whether lighting can enable new strategies to improve indoor environmental workplace satisfaction.

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Section: Discussionsupporting

confidence: 84%

Interactions between the perception of light and temperature

2018

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“…Forty‐five papers have been finally collected to review the most recent studies on combined effects of environmental factors upon human performance and comfort. Details are provided in the Appendix S1 (SI.2) and in particular in Table SI.1.…”

Section: Methodsmentioning

confidence: 99%

“…The majority of studies (Figure ) was designed for an unspecific target of buildings or was specifically designed to test interaction effects in office buildings . Just few articles focused on aircrafts or schools …”

Section: Review Of Methodological Approachesmentioning

confidence: 99%

“…As far as experimental procedures are concerned, distinction can be made between one‐stage and multi‐stage experiments, as indicated in Table SI.1. In the former—73% of laboratory studies—subjects are exposed to a single or to a series of exposure conditions for each experimental session, sometimes following a neutralization period; in any case, perception and performance are dealt by researchers as expression of a single exposure condition.…”

Section: Review Of Methodological Approachesmentioning

confidence: 99%

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Combined effects of environmental factors on human perception and objective performance: A review of experimental laboratory works

et al. 2018

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This study reports the outcomes of a literature survey aimed at exploring how different environmental factors-that is acoustic, thermal, visual, and air quality stimuli-interact in affecting building occupants' perception and performance. Recent laboratory studies have been collected, and their methodological approaches reviewed in terms of experimental design, adopted exposures conditions, perception and performance assessment methods. Results have been summarized and compared to identify interaction patterns between environmental factors and possible practical implications for improving the design of both experimental studies and the built environment. The analysis allows highlighting limitations, potential improvements and future opportunities in this field of research, thus providing a reference for further investigations aimed at a deeper understanding, modeling, and prediction of the impacts caused by the main indoor variables on human comfort and performance.

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“…In low temperatures, people seem to prefer lower colour temperatures, whereas in higher temperatures, higher colour temperatures are preferred [36]. The temperature in the day care centre was kept at room temperature.…”

Section: Behaviour and Physical Symptomsmentioning

confidence: 99%