Saving energy with light? Experimental studies assessing the impact of colour temperature on thermal comfort

Huebner, Gesche M.; Shipworth, David; Gauthier, Stephanie; Witzel, Christoph; Raynham, Peter; Chan, Wing-Shing

doi:10.1016/j.erss.2016.02.008

Cited by 83 publications

(53 citation statements)

References 46 publications

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“…Therefore, it could be that even though the perceived color significantly differed between the 2700 K and 5800 K sessions, this difference in perceived color was too small to affect thermal sensation or thermal comfort. The light intensity can influence the hue‐heat effect, but the literature is not conclusive in this respect . Unfortunately, not all studies testing the hue‐heat hypothesis reported the light intensity that was used during the experiments .…”

Section: Discussionmentioning

confidence: 99%

“…More recently, the study of Huebner et al. (2016) also found evidence for this hypothesis; thermal comfort ratings were higher when participants were exposed to 2700 K compared to 6500 K light, but concluded that more research is required to determine its practical value . Baniya et al (2016) did not find direct evidence for the hue‐heat hypothesis although participants felt thermally more comfortable under light with a correlated color temperature (CCT) of their preference .…”

Section: Introductionmentioning

confidence: 99%

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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: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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%

“…However, in some cases not all the possible combinations of levels across factors have been tested, thus resulting in a fractional factorial design ( fractional ) . In other investigations, only one environmental factor was manipulated, while maintaining other factors at a constant level, to determine whether this had an effect on the subjective perception of other unchanged environmental factors ( one factor ) …”

Section: Review Of Methodological Approachesmentioning

confidence: 99%

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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“…Yellowish and reddish with warm CCT [24,25] have been alleged to produce beneficial psychological effects [26][27][28][29] however, the empirical data supporting this is weak [30]. Quantity of light (i.e.…”

Section: Introductionmentioning

confidence: 99%