Effects of nighttime lights by LED and fluorescent lighting on human melatonin

NCUIR > Engineering College > Department of Chemical and Materials Engineering > journal & Dissertation > Item 987654321/102021

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/102021

Title:	Effects of nighttime lights by LED and fluorescent lighting on human melatonin
Authors:	劉正毓;Lu, Chien-Chun;Chou, Chinmei;Yasukouchi, Akira;Kozaki, Tomoaki;Liu, Cheng-Yi
Contributors:	工學院化學工程與材料工程學系
Keywords:	Artificial Intelligence;Body temperature;Circadian rhythm;Color temperature;Computational Intelligence;Controllability;Diameters;Engineering;Experiments;Fluorescence;Humidity;Light emitting diodes;Light sources;Lighting;Lumens;Melatonin;Night;Original Research;Robotics and Automation;Sensory stimulation;Sleep;Test methods;User Interfaces and Human Computer Interaction;Visual fields
Date:	2016-12-01
Issue Date:	2026-04-21 14:57:04 (UTC+8)
Publisher:	Springer Verlag;Berlin/Heidelberg: Springer Science and Business Media LLC
Abstract:	摘要： In this study, we used an LED (light-emitting diodes) light source to develop the the best combination of light wavelengths for nighttime lighting based on the LED advantages of narrow band and controllable spectrum.The action spectrum is based the research of Professor Brainard in the field of non-visual response model, which is used for designing circadian stimulation of LED. The CS/Lm (Circadian stimulus/Photonics lumens) values were calculated from the equations, which resulted in 8.9 × 10−4 for Fluorescent lighting (FL) of correlated color temperature (CCT) 5000 K, 5.2 × 10−4 for FL of CCT 3000 K and 4.4 × 10−4 for LED lighting of CCT 3000 K. Eight healthy males were exposed to various lighting conditions at midnight, and the physiological parameters including pupil diameter, melatonin secretion, delay of melatonin onset (DLMO), rectal temperature and subjective sleepiness were measured. Two results from the experiment were generated. Result (1) shows that LED 3000 K demonstrated the melatonin significantly increased (p < 0.05) when the light exposures of LED 3000 K, FL 3000 K and FL 5000 K reached retina with identical quantum state. Result (2) shows the melatonin onset in the 2nd night under LED 3000 K was almost the same as that under dim condition. The experimental results show that LED lighting will lead to lower interference on melatonin and DLMO than fluorescent lights, which is similar to the result of CS value. This paper provides a sound basis for designing LED spectrum concepts. By the simulation spectrum program develops, and the experiment verification. LED light source shows a high-value potential to use in our daily life. 其他題名： J Ambient Intell Human Comput 出版者： Berlin/Heidelberg: Springer Science and Business Media LLC 出版日期： 2016-12-01 出處： Journal of Ambient Intelligence and Humanized Computing, 2016-12, Vol.7 (6), p.837-844 版權： Springer-Verlag Berlin Heidelberg 2016 版權： Springer-Verlag Berlin Heidelberg 2016. 識別號： ISSN: 1868-5137 識別號： EISSN: 1868-5145 識別號： DOI: 10.1007/s12652-016-0383-2
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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