Research on work efficiency and light comfort based on EEG evaluation method

Abstract

The indoor light environment is known to significantly affect the performance, emotions, and physical and mental health of the working staff; therefore, improving the working environment can augment their working efficiency. In this study, the results of the subjective, task, and physiological evaluations of personnel under different combinations of five illumination levels (75 lx, 100 lx, 200 lx, 300 lx, 500 lx) and three colour temperatures (3000 K, 4000 K, 6000 K) have been analysed. The subjective evaluation shows that illumination has a highly significant influence on the perception of brightness, colour authenticity, spaciousness, fatigue, and relaxation, whereas colour temperature only affects the perception of spaciousness. Improving the illumination of the work environment within the scope of the study has been observed to help in improving the light comfort, but with a declining trend. The task evaluation showed that colour temperature is a significant factor that affects the reading efficiency, which is generally improved using a neutral colour temperature. The physiological evaluation indicated that illumination significantly affects the response of the visual centre. A comprehensive light comfort zone is suggested based on this research, which could be a valuable reference for designing the indoor light environments and improving the satisfaction associated with the light environment.