研究目的
To evaluate and compare the degree of visual fatigue caused by long-term working under different lighting conditions, specifically steady light from fluorescent luminaires and modulated light from LED luminaires with different modulation depths.
研究成果
Visual fatigue increases with working time under all tested lighting conditions. LEDs with 100% modulation depth caused significantly more severe symptoms than fluorescent luminaires, while LEDs with 75% modulation depth were fully accepted by participants. Physiological signals such as SpO2 and Heart Rate were effective indicators of visual fatigue.
研究不足
The study focused on the impact of lighting conditions on visual fatigue over a single day's work. The influence of longer-term exposure and other environmental factors were not explored. Additionally, the study's sample size was limited to 20 subjects per experiment.
1：Experimental Design and Method Selection:
The study compared visual fatigue under steady light from fluorescent luminaires and modulated light from LED luminaires with 100% and 75% modulation depths. Subjective reports and physiological signals were used to evaluate fatigue.
2：Sample Selection and Data Sources:
20 subjects participated in each experiment, with each subject experiencing both lighting conditions in randomized order on different days.
3：List of Experimental Equipment and Materials:
Biopac (MP150) BioNomadix wireless physiology system for physiological signal acquisition, with sensors for SKT, SpO2, GSR, and ECG.
4：Experimental Procedures and Operational Workflow:
Subjects worked under test lighting conditions for approximately 7 hours, filling out questionnaires and undergoing physiological measurements at specific intervals.
5：Data Analysis Methods:
Subjective data analyzed with SPSS using paired-samples T tests. Physiological data analyzed offline with AcqKnowledge 4.2 software, with ANOVAs conducted to assess the impact of lighting conditions and measurement time.
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