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Author (up) Yang, M.; Ma, N.; Zhu, Y.; Su, Y.-C.; Chen, Q.; Hsiao, F.-C.; Ji, Y.; Yang, C.-M.; Zhou, G. url  doi
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  Title The Acute Effects of Intermittent Light Exposure in the Evening on Alertness and Subsequent Sleep Architecture Type Journal Article
  Year 2018 Publication International Journal of Environmental Research and Public Health Abbreviated Journal Int J Environ Res Public Health  
  Volume 15 Issue 3 Pages  
  Keywords Human Health  
  Abstract Exposure to bright light is typically intermittent in our daily life. However, the acute effects of intermittent light on alertness and sleep have seldom been explored. To investigate this issue, we employed within-subject design and compared the effects of three light conditions: intermittent bright light (30-min pulse of blue-enriched bright light (~1000 lux, ~6000 K) alternating with 30-min dim normal light (~5 lux, ~3600 K) three times); continuous bright light; and continuous dim light on subjective and objective alertness and subsequent sleep structure. Each light exposure was conducted during the three hours before bedtime. Fifteen healthy volunteers (20 +/- 3.4 years; seven males) were scheduled to stay in the sleep laboratory for four separated nights (one for adaptation and the others for the light exposures) with a period of at least one week between nights. The results showed that when compared with dim light, both intermittent light and continuous bright light significantly increased subjective alertness and decreased sleep efficiency (SE) and total sleep time (TST). Intermittent light significantly increased objective alertness than dim light did during the second half of the light-exposure period. Our results suggested that intermittent light was as effective as continuous bright light in their acute effects in enhancing subjective and objective alertness and in negatively impacting subsequent sleep.  
  Address Shenzhen Guohua Optoelectronics Tech. Co., Ltd., Shenzhen 518110, China. guofu.zhou@m.scnu.edu.cn  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1660-4601 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:29543731 Approved no  
  Call Number GFZ @ kyba @ Serial 1822  
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