THE RESPONSES OF THE AUTONOMIC NERVOUS SYSTEM ON HUMANS WHEN WORKING WITH DIFFERENT LED LIGHTING CONDITIONS

摘要

Good working luminous environment is primary for interior workers. In this study, human responses of autonomic nervous system to different white LED lighting work environment are proposed, expecting to find out the interior working light source being able to effectively enhance concentration and comfort. Total 12 subjects participated in this experiment. The subjects executed reading and tasks for about 1 hour, when the electrocardiograph signals were fully measured in the experimental process. The electrocardiograph information can be transferred into heart rate variability (HRV), where the high frequency power (HFP) stands for the parasympathestic activity index in human autonomic nervous system and low frequency power (LFP) represents the sympathestic activity index. The experimental results reveal that the subjects obviously enhance the sympathestic activity index under colour temperature 6000K and dominant wavelength 420nm. It shows that the subjects might feel energetic and enhance the concentration under such luminous environment.