Circadian stimulus as a tool for the lighting project aimed at the health of night shift workers

• Grant number: 21/05001-1
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2022
• End date: February 29, 2024
• Field of knowledge: Applied Social Sciences - Architecture and Town Planning - Architecture and Urbanism Technology
• Principal Investigator: Leonardo Marques Monteiro
• Grantee: Rose Raad
• Host Institution: Faculdade de Arquitetura e Urbanismo (FAU). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The design of a good lighting design for offices must take into account not only the demands inherent to visual tasks, but also the demands of the endogenous biological system. Especially for night shift workers, exposure to light during the work period deserves even more attention, since the inadequate stimulation time of the retinal ganglion cells can compromise health. The objective of this study is to verify the effect of projected lighting on sleep and activity/rest rhythm of night shift workers. Based on the empirical method, an initial measurements of the characteristics of the physical space and the existing lighting will be carried out to calculate the circadian stimulus of the current lighting, using the Circadian Stimulus (CS) metric, as well as the measurement of its impact on the activity/rest rhythm and sleep of night shift workers, through a first stage of actimetry. Based on this information, a new lighting system will be designed,through the addition of table lamps, which complies with the requirements for visual lighting in the work environment and also offers a desirable circadian stimulus throughout the night shift work (24h-06h). After the installation of the new luminaires, new measurements of biological variables will be made through a second stage of actimetry. A means comparison test will be used to compare the variables of interest before and after the implantation of the projected lighting, in order to establish possible associations between the light and its impact on health. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

RAAD, Rose. In the light of work: a comparative study of a lighting intervention aimed at the health of night workers. 2024. Master's Dissertation - Universidade de São Paulo (USP). Faculdade de Arquitetura e Urbanismo (FAU/SBI) São Paulo.