TY - JOUR
T1 - Impacts of dynamic led lighting on the well-being and experience of office occupants
AU - Zhang, Rongpeng
AU - Campanella, Carolina
AU - Aristizabal, Sara
AU - Jamrozik, Anja
AU - Zhao, Jie
AU - Porter, Paige
AU - Ly, Shaun
AU - Bauer, Brent A.
N1 - Funding Information:
Funding: This research is collaboratively funded by Panasonic Life Solutions and Well Living Lab.
Funding Information:
Acknowledgments: The authors would like to thank Nick Clements and Syed Shabih Hasan for constructive comments on the study design, Jeyakumar Raman for IT support, and Kevin Hovde, Christian Ramos, and Joleen Bernau for subject recruitment and study operation coordination. We are also grateful for the financial support from Panasonic Life Solutions and technical cooperation with its research team. Specifically, we would like to thank Hiroki Noguchi for insights and comments on the study design, Masaaki Ikehara for contributions on the lighting system design and lighting controller configuration, and Michael Stelts for luminaire certification and installation coordination. We would like to thank Barbara Spurrier, Tomoo Otsuka, and Takaaki Yoshikawa for building up the alliance partnership and the administrative support.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - As a critical factor in the built environment, lighting presents considerable influence on occupants. Previous research across static lighting conditions has found that both illuminance and correlated color temperature (CCT) affect occupants’ physiological and psychological functioning. However, little research has been conducted on the non-visual impacts of dynamic lighting with daily variation in illuminance and CCT levels. The purpose of this study is to better understand the impact of dynamic lighting on office occupants’ health, well-being and experience at a living lab. Fifteen participants were recruited to work in three office modules for four months. Four lighting conditions were designed and implemented in this study, including two static lighting conditions and two dynamic lighting conditions with a specific predefined control scheme. A prototype lighting system with enhanced control capabilities was configured and implemented to ensure the desired lighting environment protocol. Both objective methods and subjective surveys were used to assess the behavioral and physiological outcomes of interest, including mental stress, sleep, productivity, satisfaction, mood, visual comfort and perceived naturalness. The results showed that the daytime behavioral impacts were either positive or mixed. Specifically, a significant alertness increase was observed in the afternoon, indicating a potential solution to reduce the natural feelings of sleepiness during the workday. There was also a marginal benefit for mood. The nighttime impacts include a significant decrease in perceived sleep quality and sleep time after subjects were exposed to dynamic lighting. No significant differences were observed for mental stress, productivity, visual comfort, or perceived naturalness. The findings present additional insights into the non-visual impacts of dynamic lighting and give recommendations for further investigations.
AB - As a critical factor in the built environment, lighting presents considerable influence on occupants. Previous research across static lighting conditions has found that both illuminance and correlated color temperature (CCT) affect occupants’ physiological and psychological functioning. However, little research has been conducted on the non-visual impacts of dynamic lighting with daily variation in illuminance and CCT levels. The purpose of this study is to better understand the impact of dynamic lighting on office occupants’ health, well-being and experience at a living lab. Fifteen participants were recruited to work in three office modules for four months. Four lighting conditions were designed and implemented in this study, including two static lighting conditions and two dynamic lighting conditions with a specific predefined control scheme. A prototype lighting system with enhanced control capabilities was configured and implemented to ensure the desired lighting environment protocol. Both objective methods and subjective surveys were used to assess the behavioral and physiological outcomes of interest, including mental stress, sleep, productivity, satisfaction, mood, visual comfort and perceived naturalness. The results showed that the daytime behavioral impacts were either positive or mixed. Specifically, a significant alertness increase was observed in the afternoon, indicating a potential solution to reduce the natural feelings of sleepiness during the workday. There was also a marginal benefit for mood. The nighttime impacts include a significant decrease in perceived sleep quality and sleep time after subjects were exposed to dynamic lighting. No significant differences were observed for mental stress, productivity, visual comfort, or perceived naturalness. The findings present additional insights into the non-visual impacts of dynamic lighting and give recommendations for further investigations.
KW - Dynamic lighting
KW - Experience
KW - Healthy building
KW - Intelligent control
KW - Office occupants
KW - Well-being
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U2 - 10.3390/ijerph17197217
DO - 10.3390/ijerph17197217
M3 - Article
C2 - 33023141
AN - SCOPUS:85092076194
VL - 17
SP - 1
EP - 27
JO - International Journal of Environmental Research and Public Health
JF - International Journal of Environmental Research and Public Health
SN - 1661-7827
IS - 19
M1 - 7217
ER -