ISSN 1671-3710
CN 11-4766/R

心理科学进展 ›› 2023, Vol. 31 ›› Issue (9): 1698-1713.doi: 10.3724/SP.J.1042.2023.01698

• 研究前沿 • 上一篇    下一篇


何美亨1,2, 汝涛涛2(), 李乐3, 李丝雨1,2, 张辰泽1,2, 周国富2,3   

  1. 1华南师范大学心理学院 光与身心健康实验室, 广州 510631
    2华南师范大学 国家绿色光电子国际联合研究中心, 广州 510006
    3华南师范大学 华南先进光电子研究院, 广州 510006
  • 收稿日期:2022-08-21 出版日期:2023-09-15 发布日期:2023-05-31
  • 通讯作者: 汝涛涛
  • 基金资助:
    广州市科技计划(2019050001);广州市科技计划(2021 to RT);广东省光信息材料与技术重点实验室(2017B030301007);广州市电子纸显示材料与器件重点实验室(201705030007);国家高等学校学科创新引智计划111引智基地项目;华南师范大学心理学院研究生科研创新基金资助项目(PSY-SCNU202120)

The optimization effects of daytime light exposure on sleep and its mechanisms

HE Meiheng1,2, RU Taotao2(), LI Le3, LI Siyu1,2, ZHANG Chenze1,2, ZHOU Guofu2,3   

  1. 1Lab of Lighting and Physio-psychological Health, School of Psychology, South China Normal University, Guangzhou 510631, China
    2National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China
    3South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
  • Received:2022-08-21 Online:2023-09-15 Published:2023-05-31
  • Contact: RU Taotao


光照作为最重要的授时因子, 对机体的昼夜节律与睡眠具有显著的调节作用。已有研究发现日间更多的光照暴露, 特别是晨间高强度光照会显著促进个体的夜间睡眠, 但这一优化效果会受到光照参数和个体特征等的调节。日间光照可以通过前置或延迟机体的生物节律进而对睡眠产生间接影响; 而日光暴露是否会通过调节睡眠内稳态压力直接影响睡眠尚不明晰。未来研究可探究日光水平与时间对睡眠的交互影响, 面向特定人群如长期室内办公者、轮班工作人员或睡眠障碍群体构建健康人因照明模式。

关键词: 日间光照, 睡眠, 健康照明, 作用机制, 生物节律


As a dominant Zeitgeber (i.e., time giver), ambient light can affect sleep-wake behavior patterns by regulating circadian rhythm through the suprachiasmatic nuclei (SCN), which are known as the central circadian pacemaker in human beings. Artificial light at night (ALAN) has been well established to inhibit melatonin secretion, delay circadian rhythm, increase sleep disturbance, and reduce sleep quality. In contrast, field- and laboratory-based empirical studies have revealed beneficial effects of daytime light on sleep, suggesting that exposure to a high-level or larger amount of light exposure during the daytime could advance the sleep onset time, improve sleep efficiency, shorten sleep latency, decrease sleep disturbance, and improve sleep quality. However, such benefits are not always reported and the above-mentioned effects of daytime light on sleep can be governed by the parameters of daytime light (e.g. light level and spectrum), temporal factors (time of day, duration), and the light mode. The magnitude of the effects of daytime light on improving nighttime sleep can be predicted by constructing mathematical equations that couple the variables of light level, duration, and human psychological response threshold. The additional studies are required to further explore the effect of daytime light exposure on sleep.
In addition, light affects nighttime sleep through two pathways. On the one hand, light can indirectly influence the sleep-wake cycle by resetting circadian rhythms through the SCN, on the other hand, light can also directly affect sleep through the projection of melanopsin expressed by intrinsically photosensitive retinal ganglion cells (ipRGCs) to sleep- and wakefulness-related brain regions. The sleep-wake cycle of the organism is regulated by the interaction of the circadian process and sleep homeostatic process. Whereas whether daytime light exposure could affect nocturnal sleep by regulating sleep homeostatic process remains largely unknown., it’s still necessary to explore the mechanism underlying the effect of light on sleep.
Furthermore, in practical life, the de-synchronization between the natural light-dark cycle and human inner rhythms is becoming more and more pronounced, resulting in a higher risk of circadian rhythm disturbances and subsidiary health complaints such as sleep and affective disorders. Therefore, how to create a healthy lighting is still a key and attractive research topic concerned by academia and industry in the modern society where artificial light pollution is everywhere. Future research can integrate the personal physical and psychological requirements, for light and the diversity of working scenarios together to design a “human centric lighting”, which is of important economic and social value for enhancing people’s work efficiency, regulating mood, optimizing sleep, and improving well-being.

Key words: daytime light, sleep, healthy lighting, mechanism, circadian rhythm