Effects of LED lighting characteristics on visual performance of elderly people

Yamagishi, Masao; Yamaba, Kazuo; Kubo, Chiho; Nokura, Kunihiro; Nagata, M.

doi:10.4017/gt.2008.07.02.180.00

Cited by 14 publications

(22 citation statements)

References 6 publications

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“…The study found that the focused and sustained attention is affected by CCT. In specific, among the three CCT conditions (2700, 4300, and 6500 K), attention is significantly better when CCT is 4300 K. This finding is consistent with the study of Yamagishi et al . that examined the effects of CCT conditions (2500, 5000, and 8200 K; illuminance controlled at 470 lux) on both elderly people and younger people using NV test.…”

Section: Discussionsupporting

confidence: 90%

“…In a study on in‐vehicle reading light, LED is found to be superior to that of fluorescent lamp and incandescent lamp . Another study examining the effects of CCT on the visual performance under white LED lighting concluded that LED lighting with higher CCT (5000 K or higher) is better for visual performance . In short, findings of the relationships between CCT and visual performance seem to suggest that higher CCT will result in better visual performance .…”

Section: Introductionmentioning

confidence: 99%

“…The basic idea of the tests is to ask the subjects to perform a tedious task to respond to targets (such as symbols and numbers) over a period of time. Previous studies of the effects of CCT measured continuous performance using various tasks such as short‐term memory recall, word repetition, the GO/NOGO task, the Paced Visual Serial Addition Task, and the Numerical Verification (NV) Task . It is suggested that lighting with warm‐white color temperature results in better cognitive performance and a higher level of positive affect .…”

Section: Introductionmentioning

confidence: 99%

“…Based on the existing literature, the current study intends to test the hypothesis that CCT of LED white lighting are associated with people's focused and sustained attention. This study also examines the relationship between CCTs and the subjects' perception of comfort and clarity …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of correlated color temperature on focused and sustained attention under white LED desk lighting

Huang

Lee

Chiu

et al. 2014

Color Research & Application

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Since the Kruithof's work on general illumination, the relationships between correlated color temperatures (CCTs) and human behavior are well documented. In the recent years, because of the high growth of light‐emitting diode (LED) lighting products, studies on the effects of LED lighting on human behavior have emerged. This study examines the effects of CCTs on focused and sustained attention under white LED desk lighting. Three CCT conditions (2700, 4300, and 6500 K) are examined, and the Chu Attention Test was used to measure focused and sustained attention. Results show that CCTs affect attention. In specific, the 4300 K condition resulted in a significantly better focused and sustained attention. Comfortableness and clarity are rated by the subjects. The self‐reported comfort shows no significant differences among the three conditions, but clarity shows significant differences. Gender differences are also discussed. It is found that the self‐reported clarity by males show no significant differences among the three lighting conditions, whereas the self‐reported clarity by females is significantly lower when CCT is 2700 K. © 2014 Wiley Periodicals, Inc. Col Res Appl, 40, 281–286, 2015

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of correlated color temperature on focused and sustained attention under white LED desk lighting

Huang

Lee

Chiu

et al. 2014

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…It is also known that at threshold, contrast sensitivity is an achromatic response and that the chromatic content does not influence the luminous contrast sensitivity [28]. It is usually reported that colour temperature conditions only slightly affect performance [29]. Also, it has been shown that, under photopic conditions, the reading rates of normal subjects are independent of wavelengths [30].…”

Section: Visual Performancementioning

confidence: 97%

Kruithof's rule revisited using LED illumination

Viénot

Durand

Mahler

2009

Journal of Modern Optics

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Effect of correlated color temperature and illuminance on sustained attention collected via electroencephalography signals

Feng

Jiang

2023

Hum Ftrs & Erg Mfg Svc

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This study aimed to explore the differences in the subjects' sustained attention under the impact of nine lighting conditions consisting of the combination of three commonly used correlated color temperature (CCT) (3300 K, 4300 K, and 5300 K) and illuminance levels (300 lx, 500 lx, and 750 lx) to provide guidance on the adjustment of CCT and illuminance level parameters for indoor lighting. We selected 24 physically and mentally healthy university students (12 male and 12 female) as the experimental subjects. The subjects were required to perform sustained attention to response task (SART) activities under the nine different lighting conditions and collected the alpha (α) waves (8–12 Hz) from the electroencephalography signals. Subsequently, the mean power spectral density of the α waves and various SART parameters were analyzed and tested. Finally, the effects of different CCT and illuminance levels on the subjects' attention were compared. With the increase in CCT, the attention level tended to increase linearly, whereas the attention level was the lowest at 300 lx and the highest at 500 lx and appeared as an inverted “U” shape. The subjects' attention level was the highest at the combination of CCT of 5300 K and illuminance level of 500 lx and the lowest at the combination of CCT of 3300 K and illuminance level of 500 lx. These results provide important data to elucidate the impact of lighting condition on attention.

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Effects of LED lighting characteristics on visual performance of elderly people

Cited by 14 publications

References 6 publications

Effects of correlated color temperature on focused and sustained attention under white LED desk lighting

Effects of correlated color temperature on focused and sustained attention under white LED desk lighting

Kruithof's rule revisited using LED illumination

Effect of correlated color temperature and illuminance on sustained attention collected via electroencephalography signals

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