EFFECT OF 10-MIN LIGHT EXPOSURE ON SUBSEQUENT SLEEP DURING BRIEF AWAKENING IN THE MIDDLE OF NIGHT

摘要

Past researches explored how light wavelength, spectrum, and illumination had an impact on the melatonin and sleep at night. In addition to the researches on lighting before sleep, it was found that there was a need to get up in the middle of the night during a night's sleep. In this paper, through the LED lights of different wavelengths, commercially available fluorescent lights, and dim light (DL: <30 lx), were conducted in the middle of night. The experimental results of sleep data showed that under the situation of the LED with red chip, the alpha EEG power decreased at a faster rate, close to the significant values (p=0,06). After entering the second phase of the sleep, the sleep time was significantly shortened (p=0,02); under the situation of the absence of lighting (dim light), the sleep efficiency was lower than that of other lighting situations (p=0,083).