Effects of four workplace lighting technologies on perception, cognition and affective state

Hawes, Breanne K.; Brunyé, Tad T.; Mahoney, Caroline R.; Sullivan, John M.; Aall, Christian D.

doi:10.1016/j.ergon.2011.09.004

Cited by 93 publications

(62 citation statements)

References 34 publications

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“…Hawes et al 9) recently reported that LED lighting may have positive implications for work performance, compared to traditional fluorescent lighting. However, this finding could lead to misunderstanding because the fluorescent lighting used in their experiment had lower luminance and color temperature than the LED lighting.…”

Section: Discussionmentioning

confidence: 99%

“…To our knowledge, only one study has reported on this issue, finding that online © ML Comm LED light had positive effects on worker behavioral performance during several cognitive tasks, compared with traditional fluorescent lamps. 9 However, since the study did not evaluate the concurrent electrophysiological responses of brain activity, information processing at a cortical level was not demonstrated.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Light-Emitting Diode Light on Human Electroencephalogram in Comparison with Fluorescent Light

Lee¹,

Lee²,

Kim³

et al. 2012

J Korean Sleep Res Soc

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Objectives: Selecting suitable illumination is an integral part of increasing productivity in the office or factory, because poor lighting conditions may often cause decreased work efficiency. Light emitting diode (LED) light is becoming recognized as one of the most promising general sources of illumination. We conducted spectral power analysis of electroencephalograms (EEGs) obtained during resting and cognitive task activities to identify the effects on human arousal and cognitive performance under LED light compared with conventional fluorescent light. Methods: Thirteen healthy, right-handed students participated in the present study. Each subject took part in two experimental sessions, one under fluorescent and one under LED lighting conditions. The experimental measurements consisted of a resting state EEG, an event-related potential (ERP) during a visual working memory (VWM) task, and a questionnaire about subjective feelings regarding the lighting conditions. The EEG power spectra, the amplitude and latency of the P300 ERP component, the behavioral responses for the VWM task, and the questionnaire data were compared for the two lighting conditions. Results: The EEG spectral power showed no difference between the LED and fluorescent lighting conditions. The amplitude of the P300 component decreased significantly with increasing numbers of items, while there were no differences between the two lighting conditions. Additionally, behavioral responses and subjective feelings were the same under the two lighting conditions. Conclusions: Our study suggests that there are no significant differences between LED light and fluorescent light on the human arousal state and VWM. J Korean Sleep Res Soc 2012;9:28-33

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Light-Emitting Diode Light on Human Electroencephalogram in Comparison with Fluorescent Light

Lee¹,

Lee²,

Kim³

et al. 2012

J Korean Sleep Res Soc

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“…On the other hand, there is now scientific evidence that lighting influence health, mood, autonomic and cognitive processes, and other physiological functions [1][2][3][4][5], from which the conception of the existence of the system of non-visual effects of light arose [6], the main component of which is a special photosensitive retinal ganglion cells.…”

Section: Introductionmentioning

confidence: 99%

Research perspectives of the influence of lighting modes on changes of human functional state by means of “smart lighting”

Berlov

Baranova

Bisegna

et al. 2015

2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC)

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In studies of non-visual lighting effects conflicting results are frequently obtained. We suppose that such individual differences can be related to the initial functional state, as well as to the individual type of response to light exposure. This raises the question of the need to develop methods for express-diagnosis of functional state in response to a standardized light exposure. Our results show that the effect of fatigue during mental workload can be detected by measuring the critical flicker fusion frequency for light with the specific colors and brightness levels. However, the reliability of this method is difficult to estimate because of the different brightness of LEDs of different colors. We believe that the using of a "smart lighting" devices, allowing obtaining specific color and brightness by mixing individual colored LEDs, will overcome this limitation. Keywords-non-visual effects of light; color flicker fusion frequency; LED; functional states; mental fatigue; smart lighting; physiological labilityI.

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“…Among the different physical discomforts derived from poor IEQ, fatigue condition and sick building syndrome have been reported as the most common discomforts in buildings (Musa et al, 2012;Mendell and Heath, 2004;Tarcan and Varol, 2004;Frontczak and Wargocki, 2011;Issa et al, 2011). Studies also show that the health impairment of students and teachers resulting from poor IEQ could influence students' performance, behavior, and productivity (Mendell and Heath, 2004;Treputtharata and Tayiam, 2014;Lee et al, 2012;Earthman, 2004;Huang et al, 2012;Passero andZannin, 2012 andHawes et al, 2012). Uline and Moran (2008) have reported the lack of tendency of academics to focus when the learning process is taking place in imperfect environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Physical comfort, which refers to satisfaction of fundamental needs of occupants such as adequate lighting and space allocation for each individual, and psychological comforts, involving satisfaction of occupants with their colleagues, management, and feeling of enjoyment are factors associated with the occupants' comfort with regard to IEQ. Many studies (Montzamani et al, 2012;Putih et al, 2014;Mendell and Heath, 2004;Treputtharata and Tayiam, 2014;Sulaiman et al, 2013;Lee et al, 2012;Huang et al, 2012;Passero andZannin, 2012 andHawes et al, 2012) have identified the contribution of both physical and psychological factors associated with the occupants' satisfaction in various workplaces. However, the concept of IEQ has gained more prominence as the lifestyle in developed countries has resulted people spending the majority of their time (approximately 90%) within indoor environments (U.…”

Section: Introductionmentioning

confidence: 99%

A quantitative evaluation of indoor environmental quality in refurbished kindergarten buildings: A Malaysian case study

Salleh

Kamaruzzaman

Riley

et al. 2015

Building and Environment

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A quantitative evaluation of indoor environmental quality in refurbished kindergarten buildings: A Malaysian case study http://researchonline.ljmu.ac.uk/2559/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Users may download and/or print one copy of any article(s) in LJMU Research Online to facilitate their private study or for non-commercial research. You may not engage in further distribution of the material or use it for any profit-making activities or any commercial gain.The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription. AbstractIn the Malaysian context, the coverage of kindergarten education has improved dramatically in recent times although many kindergartens are located in buildings that were not originally designed for that purpose. Indoor Environmental Quality (IEQ) is considered to be one of the most important factors affecting the physical development of children. Hence, it is essential to evaluate the indoor conditions of those kindergartens which are based in buildings that have been refurbished and adapted from their original purpose for kindergarten usage. It is posseted that such refurbished environments provide suboptimal IEQ to support appropriate conditions for kindergarten use which is reflected in user perception and satisfaction. This study presents the results of the IEQ investigations conducted in refurbished kindergarten buildings in Malaysia with the cardinal focus on identifying occupants' satisfaction with the various IEQ factors. The study aims to utilize the results of this work to develop a benchmark for analogous studies. A total of 240 refurbished kindergarten buildings in Malaysia were studied to evaluate occupants' perceptions and levels of satisfaction. The results indicate that the occupants found "Air Movement", "Ventilation", and "Freshness" to be of a poor quality due to the high occupancy density. The "Noise" factor was the least satisfactory IEQ factor due to closeness of the kindergartens to the main roads (external noise), as well as the small size of classrooms (internal noise). Moreover, it was found that "Color" and "Attractiveness" are the most important IEQ factors from the occupants'viewpoint. This study provides a practical benchmark in conversion of buildings' usage.

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Effects of four workplace lighting technologies on perception, cognition and affective state

Cited by 93 publications

References 34 publications

Effects of Light-Emitting Diode Light on Human Electroencephalogram in Comparison with Fluorescent Light

Effects of Light-Emitting Diode Light on Human Electroencephalogram in Comparison with Fluorescent Light

Research perspectives of the influence of lighting modes on changes of human functional state by means of “smart lighting”

A quantitative evaluation of indoor environmental quality in refurbished kindergarten buildings: A Malaysian case study

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Effects of four workplace lighting technologies on perception, cognition and affective state

Cited by 93 publications

References 34 publications

Effects of Light-Emitting Diode Light on Human Electroencephalogram in Comparison with Fluorescent Light

Effects of Light-Emitting Diode Light on Human Electroencephalogram in Comparison with Fluorescent Light

Research perspectives of the influence of lighting modes on changes of human functional state by means of &#x201C;smart lighting&#x201D;

A quantitative evaluation of indoor environmental quality in refurbished kindergarten buildings: A Malaysian case study

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Research perspectives of the influence of lighting modes on changes of human functional state by means of “smart lighting”