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LED lighting system for better color rendition space: the effect of color rendering index

Authors
Lee, Su-jungS.Yoon, Heakyung CeciliaH.C.
Issue Date
3-Sep-2021
Publisher
TAYLOR & FRANCIS LTD
Keywords
Light-emitting diode (LED); color rendering index (CRI); color preference; color quality; spaces
Citation
Journal of Asian Architecture and Building Engineering, v.20, no.5, pp.556 - 565
Journal Title
Journal of Asian Architecture and Building Engineering
Volume
20
Number
5
Start Page
556
End Page
565
URI
https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/12475
DOI
10.1080/13467581.2020.1799801
ISSN
1346-7581
Abstract
This study was conducted to investigate Color Rendering Index (CRI) recommendations for light emitting diode (LED) lighting in spaces needing better color rendition. Four LED spectra, that is, two spectra at Commission Internationale de l'Eclairage (CIE) Ra < 80 (79 and 76) and two spectra at CIE Ra >= 80 (83 and 84) were used in this study. The CIE Ra lacks accuracy in predicting perceived color quality, and the Fidelity Index and the Gamut Index were used to complement the weakness of CIE Ra. These metrics were combined to quantify the average increase or decrease in chroma. One hundred ninety-four participants evaluated retail-related tasks under different lighting conditions. The results showed that the CIE Ra had significant effects on preference, brightness perception, liveliness, and arousal. LED lights with CIE Ra < 80 received higher scores for preference, brightness perception, liveliness, and arousal than LED lights with CIE Ra >= 80, indicating that CIE Ra < 80 is the proper level for LED lighting in spaces needing better color rendition.
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College of Architecture and Urban Planning (Major in Architecture)
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