抄録
This study aims to assess the influence of the combination of the illuminance and the color temperature of the task and ambient lighting to the working efficiency, the subjective assessment, and the satisfaction. The subjects simulated the office work by using the task lighting which includes six combinations of illuminance and color temperature, under the two patterns of the ambient lighting. As a result, the desired task light color was ‘neutral’ under the neutral-color ambient light. Furthermore, a high correlation coefficient was found between the self-reported working efficiency and the degree of satisfaction with task lighting.