A systematic literature review on the rationale for and effects of dynamic light scenarios

Kompier, Maaike E.; Smolders, K.C.H.J.; Kort, Y.

doi:10.1016/j.buildenv.2020.107326

Cited by 33 publications

(33 citation statements)

References 63 publications

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“…However, these studies all differed considerably in the outcome parameters that were investigated and the measurement protocols that were used. In addition, the timing of the measurements within the light scenario and the exposure duration per condition varied substantially, preventing the formulation of clear-cut conclusions [ 12 ]. Preceding structured investigations of the overall effects of a day-long dynamic light scenario, the effects of such scenarios’ individual elements (e.g., the transitions vs. the static parts) should be studied.…”

Section: Introductionmentioning

confidence: 99%

“…Importantly, the relevant photoreceptors and underlying sensory systems show marked differences in terms of temporal, spatial, spectral and intensity-related processes [6][7][8][9][10][11]. To create light scenarios that positively promote health and wellbeing in terms of both visual experiences and light effects beyond vision, we may require light that is dynamic in illuminance and correlated color temperature (CCT) [12]. Several studies have investigated effects of such dynamic scenarios and hint towards positive circadian and acute effects [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Abrupt light transitions in illuminance and correlated colour temperature result in different temporal dynamics and interindividual variability for sensation, comfort and alertness

2021

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Detailed insights in both visual effects of light and effects beyond vision due to manipulations in illuminance and correlated color temperature (CCT) are needed to optimize study protocols as well as to design light scenarios for practical applications. This study investigated temporal dynamics and interindividual variability in subjective evaluations of sensation, comfort and mood as well as subjective and objective measures of alertness, arousal and thermoregulation following abrupt transitions in illuminance and CCT in a mild cold environment. The results revealed that effects could be uniquely attributed to changes in illuminance or CCT. No interaction effects of illuminance and CCT were found for any of these markers. Responses to the abrupt transitions in illuminance and CCT always occurred immediately and exclusively amongst the subjective measures. Most of these responses diminished over time within the 45-minute light manipulation. In this period, no responses were found for objective measures of vigilance, arousal or thermoregulation. Significant interindividual variability occurred only in the visual comfort evaluation in response to changes in the intensity of the light. The results indicate that the design of dynamic light scenarios aimed to enhance human alertness and vitality requires tailoring to the individual to create visually comfortable environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Abrupt light transitions in illuminance and correlated colour temperature result in different temporal dynamics and interindividual variability for sensation, comfort and alertness

2021

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“…Subjective sleepiness was measured using the Karolinska Sleepiness Scale (KSS) with a response scale ranging from Extremely alert (1) to Extremely sleepy (9) (44). Vitality was measured using four items (Lively, Awake, Sleepy, and Drowsy; Cronbach's α = .82) that were evaluated on 5-point scales ranging from Definitely not (1) to Definitely (5). Vitality was calculated using the factor loadings that were derived through Principal Component Analysis (.70*Lively + .86*Awake -.82*Sleepy -.84*Drowsy).…”

Section: Subjective Measurementsmentioning

confidence: 99%

“…Several studies have investigated effects of such dynamic scenarios and hint towards positive effects on human functioning (e.g., [2][3][4]. However, the lack of consolidated research methods prevents the formulation of a clear-cut conclusion (5). Preceding structured investigations of the overall effects of a daylong dynamic light scenario, the effects of the scenario's individual elements (e.g., the transitions vs. the static parts) should be studied.…”

Section: Introductionmentioning

confidence: 99%

Abrupt light transitions in illuminance and CCT result in different temporal dynamics and interindividual variability for sensation, comfort and alertness

Kompier

Smolders

Kort

2020

Preprint

Self Cite

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Detailed insights in both visual effects of light and effects beyond vision due to manipulations in illuminance and correlated color temperature (CCT) are needed to optimize study protocols as well as to design light scenarios for practical applications. This study investigated temporal dynamics and interindividual variability in subjective evaluations of sensation, comfort and mood as well as subjective and objective measures of alertness, arousal and thermoregulation following abrupt transitions in illuminance and CCT in a mild cold environment. The effects could be uniquely attributed to changes in illuminance or CCT and no interaction effects of illuminance and CCT were found for any of these markers. Responses to the abrupt transitions in illuminance and CCT always occurred immediately and exclusively amongst the subjective measures. Most of these responses diminished over time within the 45-minute light manipulation. In this period, no responses were found for objective measures of vigilance, arousal nor thermoregulation. Significant interindividual variability occurred only in the visual comfort evaluation in response to changes in the intensity of the light. The results indicate that the design of dynamic light scenarios aimed to enhance human alertness and vitality requires tailoring to the individual to create visually comfortable environments.

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“…9 In addition, high-intensity light during daytime is needed, because it is the strongest cue for synchronizing the biological clock with the 24-hour rhythm of the earth. 10,11 In turn, the biological clock plays an important role in the timing and coordination of physiological and psychological processes with a circadian (24 h) rhythm, including hormone levels, body temperature, alertness, urine production and composition, sleepwake rhythm, mood and performance. [12][13][14][15] Despite the lighting needs of older persons, the literature shows that the light conditions in long-term care facilities are poor, both for visual needs as well as for entraining the biological clock.…”

Section: Introductionmentioning

confidence: 99%

Dementia Enlightened?! A Systematic Literature Review of the Influence of Indoor Environmental Light on the Health of Older Persons with Dementia in Long-Term Care Facilities

Goudriaan¹,

Boekel²,

Verbiest³

et al. 2021

CIA

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Light therapy for older persons with dementia is often administered with light boxes, even though indoor ambient light may more comfortably support the diverse lighting needs of this population. Our objective is to investigate the influence of indoor daylight and lighting on the health of older adults with dementia living in long-term care facilities. A systematic literature search was performed within PubMed, CINAHL, PsycINFO, Web of Science and Scopus databases. The included articles (n=37) were published from 1991 to 2020. These articles researched the influence of existing and changed indoor light conditions on health and resulted in seven categories of health outcomes. Although no conclusive evidence was found to support the ability of indoor light to decrease challenging behaviors or improve circadian rhythms, findings of two studies indicate that exposure to (very) cool light of moderate intensity diminished agitation. Promising effects of indoor light were to reduce depressive symptoms and facilitate spatial orientation. Furthermore, there were indications that indoor light improved one's quality of life. Despite interventions with dynamic lighting having yielded little evidence of its efficacy, its potential has been insufficiently researched among this study population. This review provides a clear and comprehensive description of the impact of diverse indoor light conditions on the health of older adults with dementia living in long-term care facilities. Variation was seen in terms of research methods, (the description of) light conditions, and participants' characteristics (types and severity of dementia), thus confounding the reliability of the findings. The authors recommend further research to corroborate the beneficial effects of indoor light on depression and to clarify its role in supporting everyday activities of this population. An implication for practice in long-term care facilities is raising the awareness of the increased lighting needs of aged residents.

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A systematic literature review on the rationale for and effects of dynamic light scenarios

Cited by 33 publications

References 63 publications

Abrupt light transitions in illuminance and correlated colour temperature result in different temporal dynamics and interindividual variability for sensation, comfort and alertness

Abrupt light transitions in illuminance and correlated colour temperature result in different temporal dynamics and interindividual variability for sensation, comfort and alertness

Abrupt light transitions in illuminance and CCT result in different temporal dynamics and interindividual variability for sensation, comfort and alertness

Dementia Enlightened?! A Systematic Literature Review of the Influence of Indoor Environmental Light on the Health of Older Persons with Dementia in Long-Term Care Facilities

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