Toward proper evaluation of light dose in indoor office environment by frontal lux meter

The wearable Brazilian illuminance meter “OcuLux” provides the opportunity to monitor continuously pupilar illuminance for indoor environment. The device is calibrated to evaluate the illuminance in lux for the range of 0 to 3500 lux with 23% of precision. This sensor was worn for 19 days in an office room of the LESO solar experimental building at EPFL (Lausanne, Switzerland), equipped with Anidolic Daylighting System (ADS) as well as a conventional window, to assess the light dose received by a human subject (30 year old female). The results showed that: i) the light dose is lower than the recommended values for most of the time; ii) in spite of asymmetrical workstation orientation, the light dose received during the morning and in the afternoon are comparable and iii) the impact of day length and sky condition on the light dose at the pupillary level is considerable.

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Jean-Louis Scartezzini, Ali Motamed, Maira Vieira Dias
2017
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https://infoscience.epfl.ch/record/232046?ln=fr

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Concepts associés (4)

Anidolic lighting

Anidolic lighting systems use anidolic optical components to light rooms. Light redirected by these systems does not converge to a focal point or form an image, hence the name (from an, without, and eidolon, image). Anidolic lighting uses non-imaging mirrors, lenses, and light guides to capture exterior sunlight and direct it deeply into rooms, while also scattering rays to avoid glare. The human eye's response to light is non-linear, so a more even distribution of the same amount of light makes a room appear brighter.

Daylighting

Daylighting is the practice of placing windows, skylights, other openings, and reflective surfaces so that direct or indirect sunlight can provide effective internal lighting. Particular attention is given to daylighting while designing a building when the aim is to maximize visual comfort or to reduce energy use. Energy savings can be achieved from the reduced use of artificial (electric) lighting or from passive solar heating.

Qualité de l'air intérieur

La qualité de l'air intérieur (QAI) recouvre l'étude des paramètres de confort (température, hygrométrie) et de la composition de l'air dans les environnements clos (bâtiments, mais aussi dans les transports en commun, par exemple), dans le but d'assurer la santé des usagers. La pollution intérieure est une notion un peu plus restreinte qui désigne classiquement les composés chimiques (hors ) susceptibles d'être présents dans l'air intérieur, ainsi que les fumées et poussières.