Evaluation of Visual- and Non-Visual Effects of Light and Design of Solid-State Lighting

2015 Fiscal Year Final Research Report

• Project/Area Number: 24360237
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Architectural environment/equipment
• Research Institution: Kyushu University
• Principal Investigator: Koga Yasuko 九州大学, 人間・環境学研究科(研究院), 准教授 (60225399)
• Co-Investigator(Kenkyū-buntansha): TAKAO Motoharu 東海大学, 情報理工学部, 教授 (90408013)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 光環境 / 視覚 / 生体リズム / 固体照明 / 分光分布 / LED / 瞳孔反射 / 分光感度

Outline of Final Research Achievements

This research work aims to clarify spectral properties of visual- and non-visual effects of optical radiation and to propose a view of solid-state lighting design that enhances health of luminous environment. Results are as follows: light sources having broadband spectral power distribution would be practically effective in adjusting sleep and awakening, short-wavelength optical radiation had a larger non-visual effect but the wavelength dependence of human physiological responses was reduced for polychromatic optical radiation, main photic factors in glare were different between photopic and mesopic conditions, and alertness during the post-lunch hours was kept in luminous environment of low colour temperature.

Free Research Field

建築環境学