Lighting Assessment in Workplaces during Day and Night Shift at a Motorcycle Part Manufacturer in Chonburi Province

Abstract

Inadequate lighting in workplace causes health effects and accidents
among workers. This research aims to study the light intensity in work
environments for different types of work, the difference of them between
day and night shift, and relationship between these factors and the
compliance with workplace lighting standards at a motorcycle part
manufacturer in Chonburi province. In a cross-sectional study, Illuminance
measurement was conducted in 984 workplaces in a manufacturing building
using a lux meter. For each workplace, the light intensity was collected
2 times in day and night shift and then compared with the workplace
lighting standards of Ministry of Labor.
The results of the study revealed statistically significant differences of
light intensity between day and night shift in all types of work (requiring
perception of detail, fine detail, and very fine detail) (p-value<0.001). The
average of light intensity in day and night shift was 753.23 and 691.88 lux,
respectively. The percentage of workplaces in accordance with workplace
light standards was 71. 65 for day shift and 66. 26 for night shift. These
percentages would decline whereas requiring perception of detail of work
increased. In addition, the data showed that work shift and type of work
had a relationship with the compliance with workplace light standards of
Ministry of Labor.