Subjective Assessments of Lighting Quality: A Measurement Review

Allan, Alicia; Hansen, Veronica Garcia; Isoardi, Gillian; Smith, Simon S.

doi:10.1080/15502724.2018.1531017

Cited by 37 publications

(27 citation statements)

References 40 publications

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“…However, it is not only the quantity of light that affects visual comfort, but also the distribution of light, and the presence or absence of glare that occurs in space and other influencing factors. According to Allan et al [45], subjective evaluation is important, in addition to evaluation of Daylight Performance Metrics (DPMs), because only doing photometric actions alone does not fully capture the subjective component of lighting.…”

Section: Discussionmentioning

confidence: 99%

An Alternative Approach in Assessing Visual Comfort Based on Students' Perceptions in Daylit Classrooms in the Tropics

Idrus¹,

Rahim²,

Hamzah³

et al. 2020

cea

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Daylight is the best lighting source for classrooms that are mostly used during the daytime. Effectiveness and productivity can be achieved if visual comfort meets the recommendations set. This study aims to develop an alternative visual comfort assessments method based on students' perceptions in the classroom with daylight. The study was carried out by collecting students' perceptions and daylight illuminance data from 25 classrooms located in seven schools in Makassar, Indonesia. A total of 737 students responded to this study. This research was conducted from morning to noon in each school. The results showed that the majority of students, as many as 57.5%, felt that the level of daylight was "Perceptible", and only 6.5% felt it was "Intolerable". The results of daylight intensity measurements of 25 classes showed that only 28% of classes meet the minimum standard of the Indonesian National Standard (SNI), and as many as 82% of classes do not meet the standard. Using a new method based on student perception, it was concluded that as many as 28% of classes were categorized as "Acceptable", as many as 48% of classes were categorized as "Preferred," and around 24% were not included in either category. This shows that there are classes that are not in accordance with recommendations, but are still acceptable according to students' perceptions. This new assessment method can be an alternative addition for designers to assess the comfort of a room with daylight by users' preferences.

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Section: Discussionmentioning

confidence: 99%

An Alternative Approach in Assessing Visual Comfort Based on Students' Perceptions in Daylit Classrooms in the Tropics

Idrus¹,

Rahim²,

Hamzah³

et al. 2020

cea

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“…Many previous studies correlated physical environmental measurements with occupant satisfaction [9]. The graphs presented in Figs.…”

Section: Experimental Datasets Correlationmentioning

confidence: 94%

“…At the same time, it contributes to decreasing the need for electrical lighting, one of the primary sources of energy costs in offices with deep spaces [6,7], while contributing to improving the building's overall sustainable performance. A substantial number of studies investigating daylighting in buildings showed that lighting environments play an essential role in occupant satisfaction towards visual comfort and overall indoor environmental quality [8,9]. Glare is one relevant component defining the perceived lighting quality.…”

Section: Introductionmentioning

confidence: 99%

A Combined Method for an Exhaustive Investigation of the Anidolic Ceiling Effect on Improving Indoor Office Daylight Quality: an Approach Based on HDR Photography and Subjective Evaluations

Daich

Saadi

Piga

et al. 2021

Journal of Daylighting

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Lighting quality in office environments is a broad concept that must be taken into account in the design stage to deliver comfortable spaces to reduce workers' stress. Indeed, daylight should be sufficient to perform visual tasks while avoiding excessive brightness, high contrast, or intense sunlight reflections that can cause discomfort glare. This research aims to test the Anidolic Integrated Ceiling (AIC) performance in creating a visually comfortable space by reducing the probability of glare. A combined method was adopted for investigating the influence of the building orientation and the workers' view directions in the different moments of the day in the winter season. Data collection was performed in an experimental environment, i.e., a physical scale model of 1:4 under real sky conditions. Three variables were: (i) the viewer's positions (parallel and face to the window), (ii) the façade orientation, (iii) the time of the day (morning and afternoon). To investigate the correlation between the simulated environment and the subjective comfort, we collected the following data in parallel: illuminance level, Daylight Glare Probability Index (DGIP), Luminance Contrast Ratios (LCR) for assessing the daylighting environments, and people reactions to the lighting setting to evaluate the perceived discomfort glare. The findings indicate that the Anidolic system's performance differs according to the occupant's orientation and her\his visual direction. The performance of the north façade of the case study application in Biskra, Algeria, was the best one. Indeed, the AIC system allows a harmonious luminance distribution without creating discomfort glare. Glare assessment shows that glare is perceived imperceptible in the lateral view (less than 0.30) and varies between imperceptible and perceptible in the parallel view (LCR values between 1:1 and 1:29). The questionnaire results show that the subjects were more satisfied with the luminous atmosphere of the lateral view than the parallel view where people more likely perceived discomfort. The statistical analysis shows that participants' perceptions of contrast and sensitivity to glare have a strong relationship with DGIP and LCR (0.000) and no correlation with illuminance and LCR.

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“…A measurement review on subjective assessments of lighting quality found no agreement on which lighting characteristics should be included in a subjective assessment of lighting quality [21]. Still, research on visual comfort focuses mainly on three aspects: daylight provision, view out, and glare protection (Figure 1) [2].…”

Section: Current State Of Research On Subjective Daylight Assesmentmentioning

confidence: 99%

Delightful Daylighting: A Framework for Describing the Experience of Daylighting in Nordic Homes and Coupling It with Quantitative Assessments

Vikberg¹,

Sepúlveda²,

Luca³

2022

Energies

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In this conceptual article we propose a framework for describing the experience of delightful daylighting in Nordic homes and a method to correlate it with an existing quantitative daylighting assessment. In contrast to earlier research on daylighting, the present work gives priority to developing the methodology for researching the experience of the inhabitant in a real situation and relying the quantitative assessment on an existing method. In this way, we shift the focus of daylight studies from quantitative evaluations towards qualitative descriptions of the human experience of daylight. The framework enables future research that can broaden the way the experience of daylighting is described and to see if the quantitative assessment according to the standard EN 17037:2018 Daylighting in buildings correlates with these descriptions. Firstly, the current state of research on subjective daylight preferences and daylight assessment is reviewed. Secondly, a novel method, the long-term spatial interview, is introduced. The aim of the method is to describe a long-term experience of a spatial phenomenon, in this case, delightful daylighting of Nordic homes, through a phenomenological perspective and enable localisation of the qualitative research results. Finally, the use of the existing EN-standard as a tool to quantitatively describe the daylight situation of spaces is explained and a correlation analysis of the quantitative and qualitative results is explicated. Future research based on the framework can provide useful information for designers aiming at creating delightful daylighting experiences in Nordic homes.

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Subjective Assessments of Lighting Quality: A Measurement Review

Cited by 37 publications

References 40 publications

An Alternative Approach in Assessing Visual Comfort Based on Students' Perceptions in Daylit Classrooms in the Tropics

An Alternative Approach in Assessing Visual Comfort Based on Students' Perceptions in Daylit Classrooms in the Tropics

A Combined Method for an Exhaustive Investigation of the Anidolic Ceiling Effect on Improving Indoor Office Daylight Quality: an Approach Based on HDR Photography and Subjective Evaluations

Delightful Daylighting: A Framework for Describing the Experience of Daylighting in Nordic Homes and Coupling It with Quantitative Assessments

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