Performance of personally worn dosimeters to study non-image forming effects of light: Assessment methods

Aarts, Mpj Mariëlle; Duijnhoven, J. van; Aries, Mbc Myriam; Rosemann, Alp Alexander

doi:10.1016/j.buildenv.2017.03.002

Cited by 46 publications

(36 citation statements)

References 18 publications

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“…Additionally, the LightWatchers were worn at chest height. Median deviations of 17% for indoor conditions and 7% for daytime outdoor conditions were reported between the illuminance measurements of the chest and eye position [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

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Can Special Light Glasses Reduce Sleepiness and Improve Sleep of Nightshift Workers? A Placebo-Controlled Explorative Field Study

et al. 2020

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Nightshift workers go against the natural sleep–wake rhythm. Light can shift the circadian clock but can also induce acute alertness. This placebo-controlled exploratory field study examined the effectiveness of light glasses to improve alertness while reducing the sleep complaints of hospital nurses working nightshifts. In a crossover within-subjects design, 23 nurses participated, using treatment glasses and placebo glasses. Sleepiness and sleep parameters were measured. A linear mixed model analysis on sleepiness revealed no significant main effect of the light intervention. An interaction effect was found indicating that under the placebo condition, sleepiness was significantly higher on the first nightshift than on the last night, while under the treatment condition, sleepiness remained stable across nightshift sessions. Sleepiness during the commute home also showed a significant interaction effect, demonstrating that after the first nightshift, driver sleepiness was higher for placebo than for treatment. Subjective sleep quality showed a negative main effect of treatment vs. placebo, particularly after the first nightshift. In retrospect, both types of light glasses were self-rated as effective. The use of light glasses during the nightshift may help to reduce driver sleepiness during the commute home, which is relevant, as all participants drove home by car or (motor) bike.

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Section: Discussionmentioning

confidence: 99%

“…Under all conditions, the sensors measured in the horizontal plane, facing upward. The light loggers were calibrated according to the procedure described in [ 33 ] (see also supplementary material for the calibration procedure). Every 10 s, a measurement was taken and automatically merged into 30-s averages.…”

Section: Methodsmentioning

confidence: 99%

Can Special Light Glasses Reduce Sleepiness and Improve Sleep of Nightshift Workers? A Placebo-Controlled Explorative Field Study

et al. 2020

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“…Retinal light exposure is the dominant synchronizer of the human circadian system 15 . Most wearable light sensors used in research are wrist-worn, prone to sleeve coverage, and do not capture light exposure at eye level 16 . The real-world significance of interindividual differences in light sensitivity is therefore yet to be determined.…”

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confidence: 99%

Evening home lighting adversely impacts the circadian system and sleep

Cain

McGlashan

Vidafar

et al. 2020

Sci Rep

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The regular rise and fall of the sun resulted in the development of 24-h rhythms in virtually all organisms. In an evolutionary heartbeat, humans have taken control of their light environment with electric light. Humans are highly sensitive to light, yet most people now use light until bedtime. We evaluated the impact of modern home lighting environments in relation to sleep and individual-level light sensitivity using a new wearable spectrophotometer. We found that nearly half of homes had bright enough light to suppress melatonin by 50%, but with a wide range of individual responses (0–87% suppression for the average home). Greater evening light relative to an individual’s average was associated with increased wakefulness after bedtime. Homes with energy-efficient lights had nearly double the melanopic illuminance of homes with incandescent lighting. These findings demonstrate that home lighting significantly affects sleep and the circadian system, but the impact of lighting for a specific individual in their home is highly unpredictable.

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“…Both aspects (measuring person-bound and close to the eye) lead to a more accurate measurement of individual luminous exposure and conclusions drawn based on effects of office lighting on OH will be more correct. Van Duijnhoven et al 64,65 demonstrated the importance of measuring individual luminous exposure by using portable measurement devices and they provided recommendations for selecting the most appropriate measurement device.…”

Section: Methodological Issuesmentioning

confidence: 99%

Systematic review on the interaction between office light conditions and occupational health: Elucidating gaps and methodological issues

Duijnhoven

Aarts

Aries

et al. 2017

Indoor and Built Environment

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Purpose The International Commission on Illumination (CIE) recommends researchers to investigate a wide variety of behavioural and health outcomes. However, researchers often investigate only a part of occupational health (OH) in relation to light. A literature study (2002–2017) regarding the relationship between office lighting conditions and OH was performed to identify gaps and methodological issues. Method The OH outcomes investigated in this paper were grouped according to the International Classification of Diseases and analysed per category: physical and physiological health, mental health, eye health, sleep parameters and visual comfort. Results Findings from the literature study (20 eligible papers) showed that all OH aspects were mostly but not exclusively measured subjectively. Furthermore, most studies investigated only a fraction of office lighting parameters and OH aspects. Conclusions It seems that Correlated Colour Temperature (CCT) and illuminance mainly correlate with OH. However, this may also be explained by gaps and methodological issues in studies described in eligible papers. Based on the literature study, an overview was composed elucidating gaps and methodological issues of office lighting and OH studies. It can be used to design and target the purpose of light and health research.

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Performance of personally worn dosimeters to study non-image forming effects of light: Assessment methods

Cited by 46 publications

References 18 publications

Can Special Light Glasses Reduce Sleepiness and Improve Sleep of Nightshift Workers? A Placebo-Controlled Explorative Field Study

Can Special Light Glasses Reduce Sleepiness and Improve Sleep of Nightshift Workers? A Placebo-Controlled Explorative Field Study

Evening home lighting adversely impacts the circadian system and sleep

Systematic review on the interaction between office light conditions and occupational health: Elucidating gaps and methodological issues

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