Effects of spectral distribution of light on the arousal level in humans

Kazuyuki Iwakiri, Akira Yasukouchi, Atsuo Murata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The effects of spectral distribution of light on the early component of contingent negative variation (CNV) and spontaneous electroencephalogram (EEG), indices generally used for the evaluation of arousal level, were investigated. Eight male volunteers (age range: 21-24 years) with normal color vision were exposed to three color temperature conditions (3000-3700K, 5000K, 6500K) coupled with three color rendering properties with flourescent lamps (Ra72-75, Ra88, Ra95-99). The CNV and spontaneous EEG were recorded for the last 8-min period of a total of 28-min exposure for each lighting condition. The arousal level was significantly higher under 6500K than 3000-3700K with Ra88 (furnished by a three-band-type fluorescent lamp). Although the early CNV potential and the relative energy of α waves were not significantly different between color temperature conditions with Ra72-75 and Ra95-99 (furnished by wide-band-type fluorescent lamps), the arousal level was significantly higher with Ra95-99 than Ra72-75 under similar lighting of 3000-3700K. The relative energy at long-wavelength-band of Ra95-99 was larger than that of Ra72-75. Further regression analysis on the relationships between the spectral distribution and arousal level was significant. These findings showed that the difference in spectral distribution rather than color temperatures and the band-type of lamps might influence the arousal level.

Original languageEnglish
Title of host publicationProceedings of the IEEE International Conference on Systems, Man and Cybernetics
PublisherIEEE
Volume2
Publication statusPublished - 1999
Externally publishedYes
Event1999 IEEE International Conference on Systems, Man, and Cybernetics 'Human Communication and Cybernetics' - Tokyo, Jpn
Duration: Oct 12 1999Oct 15 1999

Other

Other1999 IEEE International Conference on Systems, Man, and Cybernetics 'Human Communication and Cybernetics'
CityTokyo, Jpn
Period10/12/9910/15/99

Fingerprint

Color
Fluorescent lamps
Electroencephalography
Electric lamps
Lighting
Color vision
Regression analysis
Temperature
Wavelength

ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering

Cite this

Iwakiri, K., Yasukouchi, A., & Murata, A. (1999). Effects of spectral distribution of light on the arousal level in humans. In Proceedings of the IEEE International Conference on Systems, Man and Cybernetics (Vol. 2). IEEE.

Effects of spectral distribution of light on the arousal level in humans. / Iwakiri, Kazuyuki; Yasukouchi, Akira; Murata, Atsuo.

Proceedings of the IEEE International Conference on Systems, Man and Cybernetics. Vol. 2 IEEE, 1999.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Iwakiri, K, Yasukouchi, A & Murata, A 1999, Effects of spectral distribution of light on the arousal level in humans. in Proceedings of the IEEE International Conference on Systems, Man and Cybernetics. vol. 2, IEEE, 1999 IEEE International Conference on Systems, Man, and Cybernetics 'Human Communication and Cybernetics', Tokyo, Jpn, 10/12/99.
Iwakiri K, Yasukouchi A, Murata A. Effects of spectral distribution of light on the arousal level in humans. In Proceedings of the IEEE International Conference on Systems, Man and Cybernetics. Vol. 2. IEEE. 1999
Iwakiri, Kazuyuki ; Yasukouchi, Akira ; Murata, Atsuo. / Effects of spectral distribution of light on the arousal level in humans. Proceedings of the IEEE International Conference on Systems, Man and Cybernetics. Vol. 2 IEEE, 1999.
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