The Influence of Lighting on Human Circadian Rhythms

The mainly of the physiological measurement mode is measuring EEG and HRV, as an indicator to explore the impact on subject's non-subjective of the lighting, and using psychological questionnaires as subjective evaluation of the subject's physiological effects.The main purpose of this research is to look for a tunable intelligent light suitable for sleep. Subjects were a total of 30 (14 male and 16 female), mean age 23.83±0.86 years old. All subjects were required to subject to no light sleep, Good-night light sleep, and low-color-temperature light sleep. Their EEG and ECG are detected during the whole processing. Then through the analysis of HRV and EEG, observed the subject's quality of sleep. Experimental results of Good-night light is the subject's sleep for the δ wave impact of the significant rise. HRV part, nHFP strength portion are higher than no light sleep and low-color-temperature lighting sleep. This proved Good-night light really help to improve the quality of sleep.