Higher light intensity induces modulations in brain activity even during regular daytime working hours

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Abstract

We investigated the effect of exposure to bright white light as compared to a commonly experienced illuminance (1000 lx vs. 200 lx at eye level, 4000 K) on electroencephalography spectral power density during daytime. Spectral power density was measured during one hour of exposure in the morning and in the afternoon. Results showed a lower relative power density in the theta range under bright light. In the morning, relative alpha power was also lower under exposure to 1000 lx. The current findings extend earlier results on the effect of illuminance on alertness and arousal in the late evening and at night. Moreover, they largely corroborate results on subjective experience and sustained attention during daytime, and together suggest higher alertness under brighter light even for daytime exposure in everyday situations.
Original languageEnglish
Pages (from-to)433–448
JournalLighting Research and Technology
Volume48
Issue number4
DOIs
Publication statusPublished - 2016

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High intensity light
Brain
Power spectral density
Modulation
Electroencephalography

Keywords

  • Lighting; EEG; Alertness

Cite this

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title = "Higher light intensity induces modulations in brain activity even during regular daytime working hours",
abstract = "We investigated the effect of exposure to bright white light as compared to a commonly experienced illuminance (1000 lx vs. 200 lx at eye level, 4000 K) on electroencephalography spectral power density during daytime. Spectral power density was measured during one hour of exposure in the morning and in the afternoon. Results showed a lower relative power density in the theta range under bright light. In the morning, relative alpha power was also lower under exposure to 1000 lx. The current findings extend earlier results on the effect of illuminance on alertness and arousal in the late evening and at night. Moreover, they largely corroborate results on subjective experience and sustained attention during daytime, and together suggest higher alertness under brighter light even for daytime exposure in everyday situations.",
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author = "K.C.H.J. Smolders and {de Kort}, Y.A.W. and P.J.M. Cluitmans",
year = "2016",
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Higher light intensity induces modulations in brain activity even during regular daytime working hours. / Smolders, K.C.H.J.; de Kort, Y.A.W.; Cluitmans, P.J.M.

In: Lighting Research and Technology, Vol. 48, No. 4, 2016, p. 433–448.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Higher light intensity induces modulations in brain activity even during regular daytime working hours

AU - Smolders, K.C.H.J.

AU - de Kort, Y.A.W.

AU - Cluitmans, P.J.M.

PY - 2016

Y1 - 2016

N2 - We investigated the effect of exposure to bright white light as compared to a commonly experienced illuminance (1000 lx vs. 200 lx at eye level, 4000 K) on electroencephalography spectral power density during daytime. Spectral power density was measured during one hour of exposure in the morning and in the afternoon. Results showed a lower relative power density in the theta range under bright light. In the morning, relative alpha power was also lower under exposure to 1000 lx. The current findings extend earlier results on the effect of illuminance on alertness and arousal in the late evening and at night. Moreover, they largely corroborate results on subjective experience and sustained attention during daytime, and together suggest higher alertness under brighter light even for daytime exposure in everyday situations.

AB - We investigated the effect of exposure to bright white light as compared to a commonly experienced illuminance (1000 lx vs. 200 lx at eye level, 4000 K) on electroencephalography spectral power density during daytime. Spectral power density was measured during one hour of exposure in the morning and in the afternoon. Results showed a lower relative power density in the theta range under bright light. In the morning, relative alpha power was also lower under exposure to 1000 lx. The current findings extend earlier results on the effect of illuminance on alertness and arousal in the late evening and at night. Moreover, they largely corroborate results on subjective experience and sustained attention during daytime, and together suggest higher alertness under brighter light even for daytime exposure in everyday situations.

KW - Lighting; EEG; Alertness

U2 - 10.1177/1477153515576399

DO - 10.1177/1477153515576399

M3 - Article

VL - 48

SP - 433

EP - 448

JO - Lighting Research and Technology

JF - Lighting Research and Technology

SN - 1477-1535

IS - 4

ER -