Recommendations for daytime, evening, and nighttime indoor light exposure to best support physiology, sleep, and wakefulness in healthy adults

PLoS Biology, Год журнала: 2022, Номер 20(3), С. e3001571 - e3001571

Опубликована: Март 17, 2022

Ocular light exposure has important influences on human health and well-being through modulation of circadian rhythms sleep, as well neuroendocrine cognitive functions. Prevailing patterns do not optimally engage these actions for many individuals, but advances in our understanding the underpinning mechanisms emerging lighting technologies now present opportunities to adjust promote optimal physical mental performance. A newly developed, international standard provides a SI-compliant way quantifying influence intrinsically photosensitive, melanopsin-expressing, retinal neurons that mediate effects. The report recommendations lighting, based an expert scientific consensus expressed easily measured quantity (melanopic equivalent daylight illuminance (melaponic EDI)) defined within this standard. are supported by detailed analysis sensitivity circadian, neuroendocrine, alerting responses ocular provide straightforward framework inform design practice.

Язык: Английский

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Predicting melatonin suppression by light in humans: Unifying photoreceptor‐based equivalent daylight illuminances, spectral composition, timing and duration of light exposure

Journal of Pineal Research, Год журнала: 2022, Номер 72(2)

Опубликована: Янв. 4, 2022

Abstract Light‐induced melatonin suppression data from 29 peer‐reviewed publications was analysed by means of a machine‐learning approach to establish which light exposure characteristics (ie photopic illuminance, five α‐opic equivalent daylight illuminances [EDIs], duration and timing the exposure, dichotomous variables pharmacological pupil dilation narrowband source) are main determinants suppression. Melatonin in set dominated four characteristics: (1) melanopic EDI, (2) duration, (3) (4) S‐cone‐opic EDI. A logistic model used evaluate influence each these parameters on response. The final only based first three parameters, since EDI best single (photoreceptor) predictor that outperformed for (photopic) below 21 lux. This confirms extends findings importance metric predicting biological effects integrative (human‐centric) lighting applications. provides initial general guidance practitioners how combine spectrum, amount when controlling non‐visual responses light, especially is starting tool developing hypotheses photoreceptors’ contributions light's helps identifying areas where more needed, like S‐cone contribution at low illuminances.

Язык: Английский

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Multi-objective optimization of classrooms’ daylight performance and energy use in U.S. Climate Zones

Energy and Buildings, Год журнала: 2023, Номер 297, С. 113468 - 113468

Опубликована: Авг. 17, 2023

Язык: Английский

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Light-environment interactions and integrative lighting design: Connecting visual, non-visual and energy requirements in a case study experiment

Building and Environment, Год журнала: 2024, Номер 253, С. 111323 - 111323

Опубликована: Фев. 23, 2024

Beyond vision, light influences human circadian rhythms and buildings' energy consumption. Design solutions are needed to satisfy visual requirements while minimizing lighting demands. By reflecting the incident radiation, inner surfaces influence spatial spectral distribution, affecting achieve task illuminance light-induced response. Here, walls' characteristics' impact on overall luminous environment power demands is analysed in a test room, combining seven colours three sources' correlated colour temperatures (CCTs). Hence, luminaires set meet needs: eye level irradiances measured, responses obtained regarding both stimulus (CS) melanopic equivalent daylight (mel-EDI). It found that parameters higher for highly reflective walls or those most short-wavelength interval, being insufficient proper stimulation according current guidelines. For all colours, highest mel-EDIs occur with 6000 K CCT lowest 3000 CCT. On contrary, CSs generally lower 4000 K. Second, necessary calculated. With warm sources, sufficient CS mel-EDI values achieved similar eye-level illuminance, requiring outputs regardless of wall's colour. In other cases, corresponding = 136 lx much than reach 30%, 250 quite always highest.

Язык: Английский

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Individual differences and diversity in human physiological responses to light

EBioMedicine, Год журнала: 2022, Номер 75, С. 103640 - 103640

Опубликована: Янв. 1, 2022

Exposure to light affects our physiology and behaviour through a pathway connecting the retina circadian pacemaker in hypothalamus - suprachiasmatic nucleus (SCN). Recent research has identified significant individual differences non-visual effects of light,mediated by this pathway. Here, we discuss fundamentals light. We propose set actions improve evidence database be more diverse: understanding systematic bias base, dedicated efforts recruit diverse participants, routine deposition sharing data, development data standards reporting guidelines.

Язык: Английский

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Effects of Daytime Electric Light Exposure on Human Alertness and Higher Cognitive Functions: A Systematic Review

Frontiers in Psychology, Год журнала: 2022, Номер 12

Опубликована: Янв. 5, 2022

This paper reports the results of a systematic review conducted on articles examining effects daytime electric light exposure alertness and higher cognitive functions. For this, we selected 59 quantitative research from 11 online databases. The protocol was registered with PROSPERO (CRD42020157603). showed that both short-wavelength dominant intensity white induced alertness. However, those influences depended factors like participants’ homeostatic sleep drive time day participants received exposure. relationship between functions not as straightforward alerting effect. optimal property for reported dependent other factors, such task complexity properties control light. Among studies exposure, ten (morning: 3; afternoon: 7) beneficial simple performances (reaction time), four 1) complex performances. Four performance nine 5; 4) performance. Short-wavelength effect did hold indicate need further to understand influence illuminance

Язык: Английский

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Towards a digital twin architecture for the lighting industry

Future Generation Computer Systems, Год журнала: 2024, Номер 155, С. 80 - 95

Опубликована: Фев. 2, 2024

Язык: Английский

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A Wrist-Worn Internet of Things Sensor Node for Wearable Equivalent Daylight Illuminance Monitoring

IEEE Internet of Things Journal, Год журнала: 2024, Номер 11(9), С. 16148 - 16157

Опубликована: Янв. 17, 2024

Light exposure is a vital regulator of physiology and behaviour in humans. However, monitoring light not included current wearable Internet-of-Things (IoT) devices, only recently have international standards defined α-opic equivalent daylight illuminance measures for how the eye responds to light. This paper reports sensor node that can be incorporated into IoT provide real-world settings. We present system design, electronic performance testing, accuracy measurements when compared calibrated spectral source. includes consideration directional response sensor, comparison placed on different parts body, demonstration practical use over 7 days. Our device operates 3.5 days between charges, with sampling period 30 s. It has 10 channels measurement, range 415–910 nm, balancing cost considerations. Measured results 13 devices show mean absolute error less than 0.07 log lx, minimum correlation 0.99. These findings demonstrate accurate sensing feasible, including at wrist worn locations. an experimental platform future investigations based lighting control.

Язык: Английский

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Active interventions of dynamic lighting on human circadian rhythm and sleep quality in confined spaces

Building and Environment, Год журнала: 2022, Номер 226, С. 109766 - 109766

Опубликована: Ноя. 2, 2022

Язык: Английский

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The interindividual variability of sleep timing and circadian phase in humans is influenced by daytime and evening light conditions

Scientific Reports, Год журнала: 2021, Номер 11(1)

Опубликована: Июль 1, 2021

Human cognitive functioning shows circadian variations throughout the day. However, individuals largely differ in their timing during day of when they are more capable performing specific tasks and prefer to sleep. These interindividual differences preferred temporal organization sleep daytime activities define chronotype. Since a late chronotype is associated with adverse mental physical consequences, it vital importance study how lighting environments affect Here, we use mathematical model human pacemaker understand light built environment changes distribution population. In line experimental findings, show that spend days relatively dim conditions, this not only results later phase biological clock but also increases angle entrainment timing. Increasing illuminance narrow phase, effect pronounced for longer photoperiods. The demonstrate modern lifestyle towards eveningness extreme eveningness. Such model-based predictions can be used design guidelines workplace help limiting differences, craft new strategies support performance, health wellbeing.

Язык: Английский

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