Effects of CRI and GAI on Emotion and Fatigue in Office Lighting

This paper investigated the influence of Color Rendering Index on emotion and visual fatigue. By comparing the impact of different CRI and GAI values on the color perception and emotions, getting the recommended values of CRI and GAI in the office environment. In this experiment, GAI was used to assist Ra to evaluate the relationship of color rendering index with emotion and visual fatigue. The test methods used in the experiment include color matching, critical flicker frequency test, and emotion and fatigue scales, through which the experiment was conducted in different ways ranging from physiological indicators, eye fatigue indicators, emotional and fatigue scales. The experimental results were analyzed by (ANOVA) variance analysis, (PCA) principal component analysis, mean-value analysis, repeated measurement, and multivariate analysis. The results showed that the participants are most likely to produce positive emotions in the condition of GAI = 120, Ra = 80, and they are least likely to accumulate fatigue. Under GAI = 100, Ra = 100 cases, the mean value of the critical flicker frequency (CFF) difference is the smallest, and participants are not prone to fatigue. GAI has a certain influence on emotions, while the influence of Ra is smaller. Finally, GAI=100, Ra=100 and GAI=120, Ra=80 are easier to generate positive emotions.