A modified CIE mesopic table and the effectiveness of white light sources

Kostic, M; Djokic, LS

doi:10.1177/1477153511426743

Cited by 17 publications

(4 citation statements)

References 14 publications

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“…The US Department of Energy predicted that equal luminous efficacies of WW, NW and CW LEDs would be achieved in 2025 [19]. Note that the consideration of mesopic luminance levels corresponding to the photopic luminance levels most frequently applied in street lighting (0.5 -1 cd/m 2 ) enables energy savings not exceeding 5% when using NW instead of WW LEDs [20]. Therefore, in our opinion energy efficiency should no longer be the decisive criterion when selecting between NW and WW LEDs intended for street lighting, but the selection should be based on the preference of both drivers and pedestrians (only drivers if the street (road) is exclusively intended for motorized traffic).…”

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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“…It enables seeing in low-light conditions, blending luminances from bright sources like car headlights and dim areas like distant roads [23]. According to MB Kostic et al [48], LED lamps provide lower photopic luminance than HPS lamps, when their mesopic luminances are equal. The conversion to the photopic range is necessary, because road lighting regulations use photopic vision properties for design.…”

Section: Static Control Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Smart Street Light Control: A Review on Methods, Innovations, and Extended Applications

Agramelal,

Sadik,

Moubarak

et al. 2023

Energies

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As urbanization increases, streetlights have become significant consumers of electrical power, making it imperative to develop effective control methods for sustainability. This paper offers a comprehensive review on control methods of smart streetlight systems, setting itself apart by introducing a novel light scheme framework that provides a structured classification of various light control patterns, thus filling an existing gap in the literature. Unlike previous studies, this work dives into the technical specifics of individual research papers and methodologies, ranging from basic to advanced control methods like computer vision and deep learning, while also assessing the energy consumption associated with each approach. Additionally, the paper expands the discussion to explore alternative functionalities for streetlights, such as serving as communication networks, environmental monitors, and electric vehicle charging stations. This multidisciplinary research aims to be a pivotal resource for both academics and industry professionals, laying the groundwork for future innovation and sustainable solutions in urban lighting.

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“…The survey was done under two lighting regimes: (1) the normal regime with the road surface luminance of 1 cd/m 2 in each test zone (corresponding to the M3 street lighting class), and (2) the 'mesopic' regime with the photopic luminance level of 1 cd/m 2 in the HPS zone, and 0.86 cd/m 2 in the LED zone (these photopic luminances correspond to the same mesopic luminance). 24 Adjustment of the luminance levels was done using the telemanagement system and the luminance meter.…”

Section: Methodsmentioning

confidence: 99%

Drivers’ impressions under high-pressure sodium and LED street lighting

Djokić

Čabarkapa

Djuretic³

2017

Lighting Research & Technology

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In order to compare drivers’ subjective impressions when exposed to high-pressure sodium versus LED street lighting, an experiment was conducted on a Belgrade street. All general requirements for an adequate comparison of subjective impressions, equal luminances being the most important, were fulfilled. A survey was conducted using a questionnaire, which the respondents filled out immediately after driving through both zones of the illuminated street. The respondents, who were young drivers (students), aged 20–25 years, were asked to select the more appropriate of the two installations regarding seven lighting parameters as well as giving their overall impression. The two regimes for which the survey was done gave opposite results. In the normal regime, where both installations had the same photopic luminance, the LED installation was evaluated as a better solution by a majority of the respondents for most of the analysed parameters. In the mesopic regime, where both installations had the same mesopic luminance, most of the respondents judged that the high-pressure sodium installation was the better choice.

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A modified CIE mesopic table and the effectiveness of white light sources

Cited by 17 publications

References 14 publications

Drivers’ Preference for the Color of LED Street Lighting

Drivers’ Preference for the Color of LED Street Lighting

Smart Street Light Control: A Review on Methods, Innovations, and Extended Applications

Drivers’ impressions under high-pressure sodium and LED street lighting

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