Daylight Spectrum Index: A New Metric to Assess the Affinity of Light Sources with Daylighting

Acosta, Ignacio; León, Jesús; Bustamante, Pedro

doi:10.3390/en11102545

Cited by 19 publications

(12 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although this study follows a similar methodology to that of previous articles [27,31,46], it offers new nuances highlighting the novelty of the results described below:…”

Section: Aim and Objectivesmentioning

confidence: 95%

“…Most of the metrics are based on the analysis of the sample deviation in a color space, but this is not the case with the Daylight Spectrum Index (DSI) [27]. This new concept, developed by Acosta et al, determines the color affinity of a studied lamp with daylighting, comparing the Spectral Power Distribution (SPD) of both sources according to the color sensitivity functions f(L), f(M) and f(S).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Color Discrimination of Different Light Sources

et al. 2021

Self Cite

View full text Add to dashboard Cite

Light quality is a key parameter of building design, which is mainly defined by the perceived luminance and the color rendering. Nowadays, there is a wide variety of metrics that do not converge in the color rendition evaluation of current light sources. The obsolescence of the Color Rendering Index promoted the rise of new procedures to provide an accurate evaluation. However, the score provided by most of these metrics does not distinguish between color deviation and hue discrimination, giving a single value to assess the overall color perception allowed by a light source. In this context, a new study is proposed, based on the evaluation of seven different light sources, comparing the results of the most recent color rendering metrics and those observed using a Farnsworth–Munsell trial carried out with 115 participants. The results obtained show that there is a notable divergence between color rendition and hue discrimination, although there is a clear proportionality between both. Moreover, a clear relationship is observed between color discrimination and the correlative color temperature of light sources, providing a better hue distinction with cool light sources, even though the psychological preferences of the participants do not coincide with the optimal scenario for color discrimination.

show abstract

“…Although this study follows a similar methodology to that of previous articles [27,31,46], it offers new nuances highlighting the novelty of the results described below:…”

Section: Aim and Objectivesmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Assessment of Color Discrimination of Different Light Sources

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, if determination of the CRI value was attempted, it would be less than zero. As the literature reports [68][69][70][71][72], negative CRI values are not easy to interpret; however, it is commonly known that the lower the color rendering value, the worse the color rendering of the illuminated objects. In order to distinguish the values from those given in Table 1, the index "M" (from the word "measurement") was added to the individual symbols in Table 2.…”

Section: Uncovered Light Sourcesmentioning

confidence: 99%

Influence of Replacement of Sodium Lamps in Park Luminaires with LED Sources of Different Closest Color Temperature on the Effect of Light Pollution and Energy Efficiency

Tabaka

2021

Energies

View full text Add to dashboard Cite

According to the European Union (EU) regulations, EU members are obligated, among others, to improve the energy efficiency in the outdoor lighting sector. One of the ways to consider this fact is to install LED sources in luminaires. Due to the reasonable lighting requirements for the lighting of squares and parks, the cheapest way to modernize lighting is to replace conventional discharge lamps with LED sources in park luminaires. Using nine typical park luminaires, the influence of replacing classic sodium lamps with LED sources on the effect of light pollution and energy efficiency was analyzed. Using data, such as a photometric solid and a relative spectral distribution, simulation calculations were carried out in DIALux software and our own calculation tool to consider this issue. The studies considered 156 LED sources of different spectral distributions and a wide range of color temperatures from 1000 K to 9753 K as well as different color rendering index (CRI) values. The conducted studies showed that the replacement of sodium lamps with LED sources is not necessarily associated with an increased negative impact on the effect of light pollution. It was also found also that the CRI value has an influence on the degree of light pollution.

show abstract

“…The illuminance mainly depends on the sun movement during the day and the permeability and thickness of the cloud layer. [1][2][3][4][5][6][7][8][9][10][11][12] This article analyzes the possibility of measuring the sky luminance distribution using the SkyWatcher Virtuoso automated system, which was originally used for astronomical observations. However, it has the ability to mount other measuring devices and can be manually controlled or programmed according to the assumed algorithm.…”

Section: Introductionmentioning

confidence: 99%