Lighting Design for Visual Comfort and Energy Efficiency Considerations: A Patient Room Case Study

Samaneh Aghajari; Cheng-Chen Chen

doi:10.46604/ijeti.2024.13781

Authors

Samaneh Aghajari Doctoral Program in Design, College of Design, National Taipei University of Technology, Taipei, Taiwan, ROC
Cheng-Chen Chen Department of Architecture, National Taipei University of Technology, Taipei, Taiwan, ROC

DOI:

https://doi.org/10.46604/ijeti.2024.13781

Keywords:

artificial illumination, visual comfort, energy saving, LED, medical care

Abstract

Discomfort glare causes unease and distraction, significantly affecting patients, staff, and visitors. Achieving visual comfort is essential for glare reduction, as it is primarily influenced by artificial lighting in the workplace. This study examines the probability of visual comfort and the unified glare rating (UGR) as measures of discomfort glare. UGR calculations compare three types of artificial lighting sources in a hospital patient room, considering both visual comfort and energy efficiency. This study analyzes different lighting installations with a focus on surface properties and their relative height as critical factors for enhancing visuals and reducing energy consumption. The results show that increasing the reflection coefficient can reduce energy consumption while improving visual comfort. Although LED lighting generally outperforms traditional lamps, the latter can still achieve significant performance improvements with increased surface reflectance.

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