Light-induced melatonin suppression on flickering light and stedy light.

2014 Fiscal Year Final Research Report

• Project/Area Number: 25560027
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Clothing life/Dwelling life
• Research Institution: Kyushu University
• Principal Investigator: KOZAKI Taomoaki 九州大学, 芸術工学研究科(研究院), 助教 (80380715)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 光 / LED / メラトニン

Outline of Final Research Achievements

Although light at night-time contribute to make our living environment comfortable and safe, it reduce melatonin secretion and induce health risk such as cancerogenesis. This study investigated light-induced melatonin suppression at night on flickering light and steady light. Decrement of melatonin level after exposure to flickering light of 100Hz was smaller than that of steady light. However, flickering light of 1000Hz suppressed melatonin secretion as well as steady light. These finding suggests that light-induced melatonin suppression at night might be reduced under flickering light, but it depends on frequency of the flickering light.

Free Research Field

人間工学