6 September 2017 Non-visual biological effects of light on human cognition, alertness, and mood
Author Affiliations +
Light exerts non-visual effects on a wide range of biological functions and behavior apart from the visual effect. Light can regulate human circadian rhythms, like the secretion of melatonin and cortisol. Light also has influence on body’s physiological parameters, such as blood pressure, heart rate and body temperature. However, human cognitive performance, alertness and mood under different lighting conditions have not been considered thoroughly especially for the complicated visual task like surgical operating procedure. In this paper, an experiment was conducted to investigate the cognition, alertness and mood of healthy participants in a simulated operating room (OR) in the hospital. A LED surgical lamp was used as the light source, which is mixed by three color LEDs (amber, green and blue). The surgical lamp is flexible on both spectrum and intensity. Exposed to different light settings, which are varied from color temperature and luminance, participants were asked to take psychomotor vigilance task (PVT) for alertness measurement, alphabet test for cognitive performance measurement, positive and negative affect schedule (PANAS) for mood measurement. The result showed the participants’ cognitive performance, alertness and mood are related to the color temperature and luminance of the LED light. This research will have a guidance for the surgical lighting environment, which can not only enhance doctors’ efficiency during the operations, but also create a positive and peaceful surgical lighting environment.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Huaye Li, Huaye Li, Huihui Wang, Huihui Wang, Junfei Shen, Junfei Shen, Peng Sun, Peng Sun, Ting Xie, Ting Xie, Siman Zhang, Siman Zhang, Zhenrong Zheng, Zhenrong Zheng, } "Non-visual biological effects of light on human cognition, alertness, and mood", Proc. SPIE 10367, Light in Nature VI, 103670D (6 September 2017); doi: 10.1117/12.2272555; https://doi.org/10.1117/12.2272555


Investigation of gender and age related preferences of men...
Proceedings of SPIE (September 07 2016)
Development of a circadian light source
Proceedings of SPIE (November 26 2002)
Energy efficient lighting for the biological clock
Proceedings of SPIE (February 09 2011)
Spectral sensitivity of the circadian system
Proceedings of SPIE (January 26 2004)

Back to Top