Exploring Preferred Correlated Color Temperature in Outdoor Environments Using a Smart Solid-State Light Engine

Petrulis, Andrius; Petkevičius, Linas; Vitta, P.; Vaicekauskas, Rimantas; Žukauskas, A.

doi:10.1080/15502724.2017.1377085

Cited by 7 publications

(7 citation statements)

References 40 publications

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“…Papers investigating peoples' perceptions of street lighting realized by LEDs of different correlated color temperatures (CCTs) are rather scarce. Petrulis et al [8] established that within the CCT range of 1850 -10,000 K the subjects preferred CCTs of 3000 ± 200 K for an illuminance level of 5 lx (approximately 0.3 cd/m 2 ), and CCTs of 3500 ± 250 K for 50 lx (around 3 cd/m 2 ). Based on the fact that the public preferred warm white (WW) light, the 2400 K LED retrofit kit was recommended in the pilot project dealing with the replacement of 194 decorative HPS street lights with LED ones in the town of Nantucket, USA [9].…”

Section: Introductionmentioning

confidence: 99%

Drivers’ Preference for the Color of LED Street Lighting

et al. 2019

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The purpose of this paper was to initiate broad research aimed to establish the preferred color of light of LEDs from a driver's point of view. Two street lighting installations (one with 3000 K and the other with 4000 K LEDs) were evaluated both objectively and subjectively. The objective evaluation, realized using a CCD camera, included detection of small targets and pedestrians. A slight advantage was identified for the 3000 K lighting installation regarding both types of target. As for subjective evaluation (realized through a questionnaire), the task of the participants (drivers) was to choose the more appropriate between the two lighting installations regarding six lighting parameters, as well as the overall visibility. The 3000 K LED installation was evaluated as a better solution for most analyzed parameters, as well as for the overall visibility. However, only the results regarding the color of the light (in favor of the 3000 K LEDs) and the detection of small light-colored obstacles (in favor of 4000 K LEDs) were convincing, which was confirmed by the statistical analysis. Due to the obtained mild preference for the 3000 K LEDs and several limitations/challenges of the conducted surveys, it was concluded that additional research is needed in order to decide on the preferred color of light of LEDs from a driver's perspective. INDEX TERMS Street lighting, pilot project, STV concept, drivers' impressions, questionnaire, comparison of 3000 K and 4000 K LEDs.

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Section: Introductionmentioning

confidence: 99%

Drivers’ Preference for the Color of LED Street Lighting

et al. 2019

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“…Studies on the influence of CCT on perceived pleasantness show inconsistent results. Thus, Nikunen et al (2014), Paakkinen et al (2014), and Rahm and Johansson (2018) suggested that higher pleasantness is associated with fairly low CCT (around 3,000 K), while Petrulis et al (2018) claimed that when allowed, users tend to select higher values of CCT.…”

Section: Resultsmentioning

confidence: 99%

Factors Affecting Pedestrians’ Perceptions of Safety, Comfort, and Pleasantness Induced by Public Space Lighting: A Systematic Literature Review

Trop

Tavory

Portnov

2023

Environment and Behavior

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Public space lighting (PSL), if adequately designed, may significantly enhance pedestrians’ sense of safety and comfort. Yet, the accumulated knowledge about subjective evaluation of PSL is still insufficient. This paper presents a systematic literature review, carried out according to the PRISMA guidelines, of factors affecting pedestrians’ perceptions of safety, comfort, and pleasantness induced by PSL. The screening process, which focused on studies combining technical- and observer-based environmental assessments, yielded 53 eligible papers, which were then synthesized according to an adapted model for outdoor place-human relationship. This framework-based review comprehensively highlights a few common findings and practical implications, as well as multiple gaps in research coverage, many inconsistencies, and significant generalization and transferability constraints. As the review indicates, one size does not fit all, and much further research is needed to improve the tailoring of PSL to a range of contextual conditions, such as different climates, cultures, and city characteristics.

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“…For example, Incandescent and Shade WB settings are correlated to 2850 Kelvin (K) and 7500K color temperatures, respectively. This wide range of illumination color temperatures considers the range of pleasing illuminations [26,27]. Moreover, the wide color temperature range between Incandescent and Shade allows the approximation of images with color temperatures within this range by interpolation.…”

Section: Methods Overviewmentioning

confidence: 99%

Deep White-Balance Editing

Afifi¹,

Brown²

2020

Preprint

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Input image Our deep-WB editing results AWB Tungsten WB Shade WB Figure 1: Our deep white-balance editing framework produces compelling results and generalizes well to images outside our training data (e.g., image above taken from an Internet photo repository). Top: input image captured with a wrong WB setting. Bottom: our framework's AWB, Incandescent WB, and Shade WB results. Photo credit: M@tth1eu Flickr-CC BY-NC 2.0.

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Exploring Preferred Correlated Color Temperature in Outdoor Environments Using a Smart Solid-State Light Engine

Cited by 7 publications

References 40 publications

Drivers’ Preference for the Color of LED Street Lighting

Drivers’ Preference for the Color of LED Street Lighting

Factors Affecting Pedestrians’ Perceptions of Safety, Comfort, and Pleasantness Induced by Public Space Lighting: A Systematic Literature Review

Deep White-Balance Editing

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