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.

摘要

本研究旨在研究在需要更好色彩再现的空间中对发光二极管 (LED) 照明的显色指数 (CRI) 建议。本研究使用了四个 LED 光谱，即国际照明委员会 (CIE) Ra < 80（79 和 76）的两个光谱和 CIE Ra ≥ 80（83 和 84）的两个光谱。CIE Ra 在预测感知颜色质量方面缺乏准确性，使用保真度指数和色域指数来弥补 CIE Ra 的不足。结合这些指标来量化色度的平均增加或减少。194 名参与者在不同的照明条件下评估了与零售相关的任务。结果表明，CIE Ra对偏好、亮度感知、活泼和唤醒有显着影响。具有 CIE Ra < 的 LED 灯