| Summary: | 碩士 === 元智大學 === 工業工程與管理學系 === 100 === The most previous of studies considered the effects of illumination, color temperature or color rendering index of traditional lightings on peoples’ feeling of lighting and performance. However, less research studied the effects of glare and color temperature of LED lightings on work performance. Also, the investigations of LED lightings effects on physiological responses ware scarcely. For above reasons, the purpose of this research was to explore the effect of glare and color temperature of LED lightings on the office worker. To achieve this purpose, we developed two experiments that used three different types Unified Glare Rating (UGR) levels and four Correlated Color Temperature (CCT) values as experimental variables, respectively. Both the two experiments were conducted in an office-like experimental room under the LED lightings. Furthermore, we recruited nine male college students as participants in the UGR study, and eight male college students as participants in the CCT study.
In the experiments, participants were asked to execute office-like tasks. The collected data included participants’ measurements of work performance, and questionnaires. Physiological measurements, comprising Heart Rate (HR), Galvanic Skin Response (GSR), Skin Temperature, Critical Fusion Frequency (CFF), Blink Duration, Blink Frequency, Fixation Duration and Fixation Frequency, were used to evaluate participants’ arousal and comfort. And, questionnaires were used to evaluate participants’ eye fatigue, environmental feeling, task satisfaction and lighting impression.
The results of this research showed: First, both UGR and CCT had no significant effects on work performance. Second, even though the higher glare level caused the increased participants’ arousal level it also increased eye fatigue and pressure. Third, the result of the CCT study showed that participants had eyes fatigue under every CCT level. Participants felt less stress and more comfortable while CCT was set at 4000 K than CCT was set at 3000, 5000 and 7000 K. And, the result of questionnaire showed that participants preferred the light set at 4000 and 7000 K. Finally, our research findings would help improve the working environment, lighting quality, and further design healthy LED lightings.
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