The Effect of Office Lighting Strobe on Human Physiology

Abstract

LED is generally used as office light sources, and the problem of stroboscopic effect becomes apparent with LED lighting in working environments all over the world because of drivers and dimmers. So the physiological effect of working environments with different lighting strobe on human is therefore proposed in this study. The experimental lighting conditions contained three frequencies (100Hz/400Hz/1500Hz) and three modulation depths (10%/30%/70%). Ten healthy students were subjected to each condition in a simulated office. Searching the Anfimov table task, transcribing task and filling in the scales were executed in this experimental process, in which the participant’ s brainwave, pupil size, critical flicker fusion threshold (CFF) were fully measured. The results showed that pupil size was found to have no significant effect in this experiment, but fatigue scales, CFF before and after searing the Anfimov table task and brainwave of Occipital lobe all had significant results. Combing the figure of Low-Risk Level and no observable effect level (NOEL) from IEEE Std 1789TM-2015 [1], the closer the condition was to no-risk area, the greater power of the Alpha and Beta waves in the Occipital lobe, the clearer the consciousness. And difference values of CFF before and after searching task showed that the fatigue significantly increased under 70%, the fatigue scale was also in good agreement with this. And based on the results, guiding relationships were provided, which could be used as proposal for the stroboscopic effect in office applications.