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      IMPACT OF DAYLIGHT EXPOSURE ON HEALTH, WELL-BEING AND SLEEP OF OFFICE WORKERS BASED ON ACTIGRAPHY, SURVEYS, AND COMPUTER SIMULATION

      , Ph.D. Candidate , 1 , * , , Ph.D, Professor 2

      Journal of Green Building

      College Publishing

      light exposure, sleep quality, quality of life, architectural design, office environment

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          ABSTRACT

          The purpose of this study is to examine how daylight exposure affects the health and well-being of office workers. Sleep actigraphy and health and well-being related survey data were the main dependent variables in this study. Research samples were composed of participants from the United States and South Korea, each set of workers divided into those having daylight at their workplaces and those without. Fifty participants in total wore for two weeks actiwatches equipped with light sensors to measure sleep quality and exposure to ambient light levels. Additional health and well-being measurements were taken using well established survey instruments such as the SF-36 for general and mental health, and the Pittsburg Sleep Quality Index (PSQI) for sleep. In order to estimate the levels of daylight participants were exposed to, computer simulation was used to generate the total annual daylight levels in each participant’s office. Our results seem to indicate that working in daylit office spaces would lead to higher sleep quality and higher scores of the health and well-being scales compared to those who do not work under daylight conditions. Our findings indicate that it is important to provide and maintain significant daylight levels at the workplace. Consequently, in terms of architectural design, building orientation, building dimensions, and the size and height of windows should be taken into consideration to optimize or maximize daylight exposure.

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          Most cited references 43

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            “Associations between sociodemographic, sampling and health factors and various salivary cortisol indicators in a large sample without psychopathology,”

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1943-4618
                1552-6100
                Fall 2020
                9 December 2020
                : 15
                : 4
                : 19-42
                Author notes

                1. Illinois School of Architecture, University of Illinois at Urbana-Champaign, Champaign, IL

                2. Illinois School of Architecture, University of Illinois at Urbana-Champaign, Champaign, IL; boubekri@ 123456illinois.edu

                * Correspondence: jlee764@ 123456illinois.edu ; Tel.: +1-217-402-4335 (J.L.)
                Article
                i1943-4618-15-4-19
                10.3992/jgb.15.4.19

                Volumes 1-10 of JOGB are open access and do not require permission for use, though proper citation should be given. To view the licenses, visit https://creativecommons.org/licenses/by-nc/4.0/

                Page count
                Pages: 24
                Product
                Categories
                RESEARCH ARTICLES

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