Lamp spectrum and spatial brightness at photopic levels: A basis for developing a metric

Fotios, Steve; Atli, Deniz; Cheal, C; Houser, Kevin W.; Logadóttir, Ásta

doi:10.1177/1477153513503170

Cited by 23 publications

(25 citation statements)

References 83 publications

(192 reference statements)

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“…13,14 Many past studies have investigated the influence of spectral power distribution on spatial brightness, [15][16][17][18][19][20][21][22][23][24][25] Fotios et al provide a useful review. 26 Other studies have investigated the relationship between spatial brightness and light on a vertical plane 27 and also luminance within a defined field of view. 28, 29 Rea et al found illuminance on a vertical plane to correlate better with assessments of brightness than that of light on a horizontal plane.…”

Section: Introductionmentioning

confidence: 99%

Perceived adequacy of illumination, spatial brightness, horizontal illuminance and mean room surface exitance in a small office

Duff¹,

Kelly²,

Cuttle

2016

Lighting Research & Technology

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This paper presents a pilot study that investigated the suitability of mean room surface exitance as a predictor of spatial brightness and perceived adequacy of illumination, then compared these results with how horizontal illuminance predicted both items under the same conditions. An experiment used 26 participants and a small office. It exposed participants to three levels of mean room surface exitance, each delivered with three different light distributions and across three different surface reflectances, resulting in a total of 27 light scenes. A clear relationship existed between mean room surface exitance and both perceived adequacy of illumination and spatial brightness, but not between horizontal illuminance and either item. Correlations were drawn between reported levels of spatial brightness and reported levels of perceived adequacy of illumination.

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Section: Introductionmentioning

confidence: 99%

Perceived adequacy of illumination, spatial brightness, horizontal illuminance and mean room surface exitance in a small office

Duff¹,

Kelly²,

Cuttle

2016

Lighting Research & Technology

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“…Here we refer to the 20 out of 29 studies collated within a review (Fotios 2017) of Kruithof-type research that did not meet recommended best practice (CIE 2014a); for example, that in a repeated measures design the different scenes were observed in a random order, that data were statistically analyzed, and that sufficient details of the work were reported to repeat the experiment. Particular criticism may be directed to those Kruithof studies conducted after the 1990 publications of Boyce and Cuttle (1990) and Davis and Ginthner (1990), both of which presented results that disagree with Kruithof. Similarly, a review of spatial brightness studies suggested that only 19 out of 70 studies provided credible data (Fotios et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Judging the Scientific Quality of Applied Lighting Research

Veitch

Fotios

Houser

2019

LEUKOS

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Applied lighting research is inherently interdisciplinary. Any one study in which investigators seek to understand the effects of light may involve expertise drawn from fields as varied as psychology, physiology, photobiology, vision science, engineering, physics, horticulture, and architecture. Despite differences in the specifics of research methods, data management, data analysis, and presentation, the logic of scientific thinking is a common thread. This is the basis on which the peer review system operates. This article leads readers through the criteria used by journal reviewers and editors to determine the acceptability of papers for publication in a peerreviewed journal. This is done by review of the 1941 paper by Kruithof in which he described the now-famous "Kruithof curve" relating preferred light source color temperatures and illuminances: How would one review the original Kruithof paper today, and what would we expect to be told about this work in order to judge the validity of the conclusions?

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“…Reassurance is associated with spatial brightness (Blöbaum and Hunecke 2005) and spatial brightness is modified by changes in the illuminance and spectrum of lighting (Fotios and Cheal 2011;Fotios et al, 2015aFotios et al, , 2015b. Several studies have used category rating to evaluate reassurance at different illuminances, tending to conclude that higher illuminances bring greater reassurance.…”

Section: Introductionmentioning

confidence: 99%

Uniformity Predicts Pedestrian Reassurance Better Than Average Illuminance

Fotios

Liachenko-Monteiro

2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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Reassurance describes the degree of confidence a pedestrian might have to walk, a critical concern where there are national plans to promote walking rather than driving for local journeys. This paper describes a field study carried out to measure the reassurance benefit of lighting using the day-dark method. The results suggest that reassurance is better predicted by uniformity or minimum illuminance than it is by average illuminance, which is the conventional metric.

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Lamp spectrum and spatial brightness at photopic levels: A basis for developing a metric

Cited by 23 publications

References 83 publications

Perceived adequacy of illumination, spatial brightness, horizontal illuminance and mean room surface exitance in a small office

Perceived adequacy of illumination, spatial brightness, horizontal illuminance and mean room surface exitance in a small office

Judging the Scientific Quality of Applied Lighting Research

Uniformity Predicts Pedestrian Reassurance Better Than Average Illuminance

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