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

Ignacio Acosta, Jesús León and Pedro Bustamante
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Ignacio Acosta: Instituto Universitario de Arquitectura y Ciencias de la Construcción, Universidad de Sevilla, 41001 Sevilla, Spain
Jesús León: Instituto Universitario de Arquitectura y Ciencias de la Construcción, Universidad de Sevilla, 41001 Sevilla, Spain
Pedro Bustamante: Instituto Universitario de Arquitectura y Ciencias de la Construcción, Universidad de Sevilla, 41001 Sevilla, Spain

Energies, 2018, vol. 11, issue 10, 1-19

Abstract: The current scenario of colorimetry shows a wide variety of different metrics which do not converge in the assessment of the color rendering of light sources. The limitations of the Color Rendering Index have promoted the emergence of new metrics, such as the Color Quality Scale. As in the case of the previous metric, these new concepts are based on the analysis of the deviation of different color samples in a color space, contrasting the results with those obtained with a light source reference, which can vary depending on the color temperature. Within this context, the Daylight Spectrum Index is proposed. This new concept aims to determine the affinity with daylighting of electric light sources, comparing the resulting spectral power distributions of the lamps studied and that observed under natural light. The affinity of an electric light source with daylighting allows for lower energy consumption due to the better performance of human vision. The new metric proposed is evaluated following the results obtained from 80 surveys, demonstrating the usefulness of this new concept in the quantification of color rendering of LED lamps and the affinity of electric light sources with daylighting.

Keywords: colorimetry; color rendition; daylighting; light spectra; light sources; energy savings (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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