Review of Factors Influencing Discomfort Glare Perception from Daylight

Pierson, Clotilde; Wienold, Jan; Bodart, Magali

doi:10.1080/15502724.2018.1428617

Cited by 86 publications

(78 citation statements)

References 114 publications

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“…the metrics that consider contrast glare, those that consider saturation glare, and those that consider both. Saturation glare is due to a too large amount of light reaching the observer's eyes, whereas contrast glare is due to too strong a contrast between the viewing direction and a bright spot in the field of view (Pierson, 2018).…”

Section: Daylight Discomfort Glare Metricsmentioning

confidence: 99%

“…These models are based on several physical quantities of the visual scene, such as the glare source luminance, the background luminance, the solid angle and the position index of the glare source, or the vertical illuminance (Pierson, 2018). By inputting these quantities into a discomfort glare model, an estimation of the magnitude of discomfort glare in that visual scene is generated on a numeric scale.…”

Section: Introductionmentioning

confidence: 99%

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Discomfort Glare Cut-Off Values From Field and Laboratory Studies

Pierson

Khanie

Bodart

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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For the application of discomfort glare metrics, a categorisation is used, dividing the metric scale into categories of perception. These categories are separated by borderline values, or so-called cut-off values. Recent literature shows that these cut-off values are lower when they are derived from field study data than those derived from laboratory study data. To investigate this further, the data from one field study and two laboratory studies was used to derive and compare cut-off values corresponding to three borderlines. The results show that the field study cut-off values were systematically lower than the laboratory study ones, implying that discomfort glare is reported at lower stimulus magnitudes in the field. Although further research is required on that topic, several hypotheses are discussed in order to explain the gap between cut-off values derived from field data and cut-off values derived from laboratory data. Recommendations for future studies are also provided.

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Section: Daylight Discomfort Glare Metricsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Discomfort Glare Cut-Off Values From Field and Laboratory Studies

Pierson

Khanie

Bodart

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

Self Cite

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“…The visual comfort, daylight luminous comfort (Xue et al, 2016), daylight satisfaction (Galasiu and Veitch, 2006;Galatioto and Beccali, 2016), as well as a well day-lit space attributes and indices are still ambiguous concepts which relate to various luminous conditions depending on viewer's subjective perception, preferences and knowledge. Due to the constant changes in temporal, spatial and spectral characteristics of daylight, scientific comprehension of visual and non-visual comfort relates to the illumination levels, (Bodmann, 1992;Nabil and Mardaljevic, 2006), luminance patterns, (Loe et al, 2000;Van Den Wymelenberg et al, 2009), uniformity or contrast (Rockcastle et al, 2017), satisfaction with visual environment (Veitch, 2001;Galasiu and Veitch, 2006), the anti-glare measures (Wienold and Christoffersen, 2006;Wienold and Bodart, 2018), a control of daylight provision including various shading system control (Wong and Istiadji, 2004;Konis, 2013), the bio-responses correlated with ipRGCs (Lucas et al, 2014), an access to view and view ratings (Boyce et al, 2003;Tuaycharoen and Tregenza, 2007;Veitch and Galasiu, 2012), the aesthetics and a visual perception of light spaciousness (Johansson et al, 2010). The researchers propose different qualitative and descriptive methods illustrating the human perception of daylit space characteristics.…”

Section: Issues With Measuring the Human Perception Of Daylightmentioning

confidence: 99%

“…Daylight control is linked with glare and visual and thermal discomfort. These factors are described in relevant literature as major contributors to residents or workers' dissatisfaction with daylight and many scientists try to estimate boundary conditions and quantification frameworks for these daylight related indices (Van Den Wymelenberg et al, 2009;Boyce and Wilkins, 2018;Pierson, 2018;Wienold and Bodart, 2018).…”

Section: Issues With Measuring the Human Perception Of Daylightmentioning

confidence: 99%

Daylight Within a Room in the Eyes of Architecture Students

Sokol¹,

Giuliani

2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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A questionnaire was conducted to investigate how 140 architecture students apprise daylight conditions within the classrooms. The participants were requested to evaluate the luminous environment and their luminous comfort. They were also asked about light preferences and knowledge on daylight metrics and regulations. The students' subjective appraisals results were compared with the experts' assessment and the on-site illuminance measurements. Later on, the students had to carry out a series of daylight indices simulations summarizing daylight conditions in their private rooms (a user's experience), and in a room, within a building, they had been designing (a designer's experience). The perception of the luminous environment was analysed against participants' comprehension of daylight simulations data. The issues students encountered during the daylight indicators analysis suggested that more coherent daylight education should be offered for future architects.

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“…Originally these variables were determined to evaluate glare from indoor electric lighting. However, recent studies suggest that they are insufficient to evaluate glare from windows (Pierson et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Eeffects of Luminance Distribution and View on Evaluation of Discomfort Glare From Windows

Iwata

Ishimura²,

Tamura³

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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Recent studies suggest that window glare is affected by more parameters than the four main variables. The view through a window is one of the parameters which includes both environmental and humanistic factors. Two series of subjective experiments were conducted using a scale-model with an artificial window. The first experiment showed that higher contrast within the window resulted in higher discomfort glare evaluation, when the average luminance of the window was the same. The window with moderate frequency of dark-light bands resulted in higher discomfort glare evaluation than the window with uniform luminance. The second experiment showed that the horizontal division windows with the view of the sky and a building resulted in significantly higher glare evaluation than the window with the view of the sky and trees. It was suggested that glare evaluation decreases by increments in the preferability of the view for the horizontal division windows.

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Review of Factors Influencing Discomfort Glare Perception from Daylight

Cited by 86 publications

References 114 publications

Discomfort Glare Cut-Off Values From Field and Laboratory Studies

Discomfort Glare Cut-Off Values From Field and Laboratory Studies

Daylight Within a Room in the Eyes of Architecture Students

Eeffects of Luminance Distribution and View on Evaluation of Discomfort Glare From Windows

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