Study on characteristics of daytime lightthat do notdelay the circadian rhythm

Research Project

Project/Area Number	23770290
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Applied anthropology
Research Institution	Kyushu University
Principal Investigator	KOZAKI Tomoaki 九州大学, 大学院・芸術工学研究院, 助教 (80380715)
Project Period (FY)	2011 – 2012
Project Status	Completed (Fiscal Year 2012)
Budget Amount *help	¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000) Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000) Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	人間工学 / 人工照明 / 生体リズム / メラトニン
Research Abstract	This study investigated the effect of different intensity of daytime light on dim light melatonin onset (DLMO). It was indicated that light exposure of 1500 lx at daytime, 3 hours in the morning, did not delay the DLMO. However, the effect of the light exposure may be depended on their lifestyle.