Lighting in educational environments: An example of a complete analysis of the effects of daylight and electric light on occupants

Bellia, Laura; Pedace, Alessia; Barbato, Giuseppe

doi:10.1016/j.buildenv.2013.04.005

Cited by 57 publications

(32 citation statements)

References 32 publications

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“…El color del entorno, los tipos de muebles, o incluso, la reflectancia del formato de lectura (papel, libro electrónico, pantallas, ...), deben considerarse como fuentes secundarias de contribuciones melanópicas para el diseño de iluminación en el entorno de cualquier edificio. Esto puede afectar a la actividad cotidiana, así como a muchas funciones reguladas por los sistemas neurovegetativo y somático, y tienen incidencia en actividades y bienestar a corto, medio y largo plazo [19,[27][28][29]. Especificar y medir la contribución melanópica de la luz en un determinado ambiente se ha convertido en un factor a tener en cuenta [30].…”

Section: Discussionunclassified

Proposal to calculate the circadian component in lighting projects

Sánchez‐Cano¹,

Pérez²,

Aporta³

2019

Opt. Pura Apl.

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There are international norms which define methods for characterizing indoor luminaries in terms of photopic considerations and visual requirements, but lighting impacts in humans in others ways than those. Light in buildings is part of the environment, the discovery of the ipRGC cells in the human retina, and its associated action spectra, lead to the introduction of initial concepts such as circadian action functions and circadian action factors. An innovative methodology is proposed and evaluated to simulate potential melanopic contribution of the lit environment to the occupants of an indoor space. By performing measurements and efficiency simulations based on real LED luminaries, we are determining which parameters could be calculated in melanopic terms. Our measurements lead us to follow a method to differentiate and complement photopic and melanopic contributions of sources. These melanopic illuminance metrics require irradiance-wavelength-dependent measurements; recalculating polar curves, modifying data files, and spectral reflectance characterization to evaluate the melanopic contribution of the lit environment. We validate a simulation model through a comparison between the experimentally measured lighting values and those provided as output by commercial lighting design software DIALux.

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Section: Discussionunclassified

Proposal to calculate the circadian component in lighting projects

Sánchez‐Cano¹,

Pérez²,

Aporta³

2019

Opt. Pura Apl.

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“…Pechacek et al, considering lighting intensity, timing, and spectrum of radiation, analysed the possibility to organize the design of a hospital room to accentuate circadian stimulus [21]. Bellia examined lighting quality in a college classroom applying new metrics to analyse non-visual effects [22]. The outcomes demonstrate that intensity and spectral power distribution (SPD) of the light received by the eyes have an important role on circadian dynamic.…”

Section: Introductionmentioning

confidence: 99%

Application of Different Circadian Lighting Metrics in a Health Residence

Busatto

Mora

Peron

et al. 2020

Journal of Daylighting

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During the last three decades, various scientific researchers analysed the connection between natural elements and human life, both as far as well-being and productivity. This study simulates circadian lighting metrics on elderly occupants in a healthcare residence, with different types of metrics. It presents an application of some metrics that try to quantify the effects of natural light on the human being. Circadian Action Factor, Circadian Stimulus, and Equivalent Melanopic Lux are considered. Starting from the spectral power distribution parameter, the three metrics are compared. The final aim is to build up a standard technique to represent the effect of key design choices on the accomplishment of endorsed circadian framework boost for healthcare residences occupied by elderly people.

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“…Peter Boyce wrote in his editorial: "…there are important effects of light exposure operating through the circadian timing system, but we suspect that many other parts of the brain are influenced by light; yet these are relatively unexplored…Many remote outcomes of interest, such as better health, faster learning …are determined by many factors, lighting being just one of them" (Boyce, 2016). It is particularly true, as the latest studies show, that correlated colour temperature is an insufficient parameter in predicting how a light source will impact on the human circadian system (Bellia, Pedace, & Barbato, 2013). Interior surfaces can diminish the circadian efficacy of illumination through spectral distortions, and the choice of surface materials and colours has indirect effect on users' wellbeing (Bellia et al, 2013;Inanici, Brennan, & Clark, 2015).…”

Section: Introductionmentioning

confidence: 99%

Kongsberg Vision Meeting 2017 Abstracts

Baraas

2017

Scand J Optom Vis Sci

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Lighting in educational environments: An example of a complete analysis of the effects of daylight and electric light on occupants

Cited by 57 publications

References 32 publications

Proposal to calculate the circadian component in lighting projects

Proposal to calculate the circadian component in lighting projects

Application of Different Circadian Lighting Metrics in a Health Residence

Kongsberg Vision Meeting 2017 Abstracts

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