Effects of Light Conditions on Tunnel Construction Workers’ Quality of Life and Work Productivity

Guanfeng Yan (), Yuhang Tian, Mingnian Wang, Tao Yan and Shiyuan Yan
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Guanfeng Yan: School of Engineering, Sichuan Normal University, Chengdu 610101, China
Yuhang Tian: School of Engineering, Sichuan Normal University, Chengdu 610101, China
Mingnian Wang: School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
Tao Yan: School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
Shiyuan Yan: College of History Culture and Tourism, Sichuan Normal University, Chengdu 610101, China

Sustainability, 2024, vol. 16, issue 20, 1-24

Abstract: Higher lighting intensity promotes workers’ productivity but few studies focus on the problems caused by lower lighting intensities at tunnel construction sites without natural light. The purpose of this study is to explore the relationship between light intensity and workers’ sleep quality, alertness, vitality, and work productivity through a theoretical structural equation model based on the literature review. Data were collected through a questionnaire survey, and 5792 valid responses were adopted for the analysis. First, the results showed that greater lighting intensity promoted workers’ productivity directly and indirectly through three mediators: sleep quality, alertness, and vitality. Then, the whole sample was classified into four groups: high intensity/high comfort, moderate intensity/moderate comfort, moderate intensity/low comfort, and low intensity/low comfort. The clustered results showed that the lighting conditions of tunnel construction sites were generally poor and that lighting comfort promoted workers’ productivity to some extent. Besides, the influence of lighting intensity on productivity declined with improved lighting conditions while the impact of lighting intensity on workers’ physiological and psychological status showed differing trends as lighting conditions varied. However, the relationships between workers’ physiological and psychological status and productivity remained stable regardless of the lighting conditions. The findings could provide a reference for developing corresponding measures to promote workers’ productivity.

Keywords: road tunnel; lighting conditions; work productivity; sleep quality; k-means algorithm (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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