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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Ignacio Acosta & Jesús León & Pedro Bustamante, 2018. "Daylight Spectrum Index: A New Metric to Assess the Affinity of Light Sources with Daylighting," Energies, MDPI, vol. 11(10), pages 1-19, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2545-:d:171707
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    References listed on IDEAS

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    1. Dušan Katunský & Erika Dolníková & Bystrík Dolník, 2018. "Daytime Lighting Assessment in Textile Factories Using Connected Windows in Slovakia: A Case Study," Sustainability, MDPI, vol. 10(3), pages 1-20, February.
    2. Acosta, Ignacio & Campano, Miguel Ángel & Molina, Juan Francisco, 2016. "Window design in architecture: Analysis of energy savings for lighting and visual comfort in residential spaces," Applied Energy, Elsevier, vol. 168(C), pages 493-506.
    3. Aniela Kaminska & Andrzej Ożadowicz, 2018. "Lighting Control Including Daylight and Energy Efficiency Improvements Analysis," Energies, MDPI, vol. 11(8), pages 1-18, August.
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    Cited by:

    1. Przemyslaw Tabaka, 2021. "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," Energies, MDPI, vol. 14(19), pages 1-30, October.

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