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dc.contributor.authorSunde, Erlend
dc.contributor.authorPedersen, Torhild
dc.contributor.authorMrdalj, Jelena
dc.contributor.authorThun, Eirunn
dc.contributor.authorGrønli, Janne
dc.contributor.authorHarris, Anette
dc.contributor.authorBjorvatn, Bjørn
dc.contributor.authorWaage, Siri
dc.contributor.authorSkene, Debra J.
dc.contributor.authorPallesen, Ståle
dc.description.abstractLight can be used to facilitate alertness, task performance and circadian adaptation during night work. Novel strategies for illumination of workplaces, using ceiling mounted LED-luminaires, allow the use of a range of different light conditions, altering intensity and spectral composition. This study ( Identifier NCT03203538) investigated the effects of short-wavelength narrow-bandwidth light (λmax = 455 nm) compared to long-wavelength narrow-bandwidth light (λmax = 625 nm), with similar photon density (~2.8 × 1014 photons/cm2/s) across light conditions, during a simulated night shift (23:00–06:45 h) when conducting cognitive performance tasks. Light conditions were administered by ceiling mounted LED-luminaires. Using a within-subjects repeated measurements study design, a total of 34 healthy young adults (27 females and 7 males; mean age = 21.6 years, SD = 2.0 years) participated. The results revealed significantly reduced sleepiness and improved task performance during the night shift with short-wavelength light compared to long-wavelength light. There was also a larger shift of the melatonin rhythm (phase delay) after working a night shift in short-wavelength light compared to long-wavelength light. Participants’ visual comfort was rated as better in the short-wavelength light than the long-wavelength light. Ceiling mounted LED-luminaires may be feasible to use in real workplaces, as these have the potential to provide light conditions that are favorable for alertness and performance among night workers.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleAlerting and Circadian Effects of Short-Wavelength vs. Long-Wavelength Narrow-Bandwidth Light during a Simulated Night Shiften_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.rights.holderCopyright 2020 The Authorsen_US
dc.source.journalClocks & Sleepen_US
dc.identifier.citationClocks & Sleep, 2020, 2 (4), 502-522en_US

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Navngivelse 4.0 Internasjonal
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