Current Insights into Optimal Lighting for Promoting Sleep and Circadian Health: Brighter Days and the Importance of Sunlight in the Built Environment

Fernandez, Fabian-Xosé

doi:10.2147/nss.s251712

Cited by 10 publications

(2 citation statements)

References 157 publications

(199 reference statements)

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“…Such systems would enable the intensity and spectrum distribution of the light to be automatically adjusted in accordance with the visual and circadian lighting requirements throughout the day. It has become widely accepted that "bright days, dark nights" describe optimal lighting conditions for sleep and circadian entrainment 50 . Following the natural darkness/light cycle, high levels of illumination should be provided in the morning to achieve high circadian stimulation, while low levels of illumination should be provided at night to achieve low circadian stimulation.…”

Section: Recommendations On Daily Light Environmentmentioning

confidence: 99%

Effects of light on sleep in older adults: a scoping review

Jiang¹,

Zhou²,

Han³

2022

Interdisciplinary Nursing Research

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In light of the increase of aging populations, there is a need to focus on how older adults experience sleep disorders. This scoping review aimed to synthesize the features of the light and its effects on sleep in older adults. A total of 25 articles focusing on the effects of light on sleep among older adults were included. We synthesized light intensity, treatment duration, and the spectrum of light therapy as well as features of natural and artificial light that were used to improve sleep outcomes. Literature has shown evidence for the positive effects of light therapy on sleep in older adults. Older adults are, therefore, encouraged to receive frequent sunlight exposure and artificial lighting that accords with the cycle of their circadian rhythms.

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Section: Recommendations On Daily Light Environmentmentioning

confidence: 99%

Effects of light on sleep in older adults: a scoping review

Jiang¹,

Zhou²,

Han³

2022

Interdisciplinary Nursing Research

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“…Light is an important circadian rhythm regulator and is sensed by intrinsically photosensitive retinal ganglion cells (ipRGCs) [2,3], as well as rods and cones. They are transmitted through the neural pathways to the suprachiasmatic nuclei (SCN) in the hypothalamus, via the paraventricular nucleus (PVN) and the superior cervical ganglia to the pineal gland, which in turn controls the concentration of hormones such as melatonin and cortisol [4], adjusts core body temperature and subjective alertness, regulates circadian rhythms and sleep-wake cycles [5], and also causes cognitive and psycho-emotional changes [6].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Static Lighting in Confined Spaces on the Circadian Parameters, Alertness, Performance and Well-Being

Wang,

Shao,

Wang

et al. 2024

Buildings

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The static lighting condition (SLC) in confined spaces may pose great challenges to the health of long-stay workers, inducing sleep disorders, cognitive decline, and negative emotions such as depression or anxiety. To explore human responses to the SLC (300 lx and 6000 K), 20 young subjects (22.6 ± 1.88 years old) were recruited in the underground confined lab for a week by measuring melatonin, core body temperature (CBT), subjective alertness (KSS score), sleep quality (Pittsburgh Sleep Quality Index, PSQI), Psychomotor Vigilance Task (PVT), Hamilton Depression Scale (HAMD) and Self-rating Anxiety Scale (SAS). The results showed a posterior shift in circadian rhythm after 1 week of confinement, with 0.62 h delay of dim light melatonin onset (DLMO), higher melatonin concentrations in the evening, lower melatonin concentrations at midnight, a day-by-day increase in KSS and CBT at bedtime, but this decreased daily when waking up, with cumulative effects. There was a progressive increase in sleep latency, PSQI scores, response time and scores of subjective emotion scales, meaning worse sleep, performance and emotional state. Due to limited exposure to high-lighting stimuli during the daytime, the initial concentrations of melatonin increased in the evening and decreased before sleep. In confined spaces, active health interventions by dynamic lighting patterns were proposed to safeguard human health and performance.

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