Volume 24, Issue 1 (5-2025)
jhosp 2025, 24(1): 13-27 |
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Fatahi K. The Effect of Ambient Light Intensity and Correlated Color Temperature on the Thermal Comfort of Nurses in Clinical Settings. jhosp 2025; 24 (1) :13-27
URL: http://jhosp.tums.ac.ir/article-1-6735-en.html
URL: http://jhosp.tums.ac.ir/article-1-6735-en.html
Department of Architecture, II.c., Islamic Azad University, Ilam, Iran. *Corresponding Author Email: karenfatahi@ yahoo.com
Abstract: (1613 Views)
Background and purpose: Nurse's thermal comfort in a clinical setting directly impacts their performance and the quality of patient care. This study investigates how two key environmental factors—ambient light intensity and Correlated Color Temperature (CCT)—influence this perception of thermal comfort.
Methods: This experimental study was conducted in a controlled laboratory setting with 60 healthy female nurses over four months (December 2024–March 2025). We assessed the effects of light intensity (at two levels: 300 and 750 lux) and CCT (at three levels: 2700 K, 4000 K, and 7800 K) on perceived thermal comfort. Data were analyzed using a two-way Analysis of Variance (ANOVA).
Results: Light intensity, CCT, and their interaction all had a statistically significant effect on nurses' perceived thermal comfort (p < .05). Optimal thermal comfort was reported at a CCT of 4000 K under both 300 and 750 lux intensities. At a warm CCT (2700 K), comfort was maintained at 300 lux but not at 750 lux. Conversely, at a cool CCT (7800 K), the 300 lux condition was perceived as uncomfortable, while the 750 lux condition was reported as comfortable.
Conclusion: This study demonstrates a significant interaction between light intensity and CCT in shaping thermal perception in a clinical context. The findings suggest that lighting design in healthcare facilities must consider both metrics simultaneously to optimize the work environment. A neutral CCT of 4000 K appears to be the most robust for maintaining thermal comfort across different light levels, highlighting its potential as a design standard for healthcare settings.
Methods: This experimental study was conducted in a controlled laboratory setting with 60 healthy female nurses over four months (December 2024–March 2025). We assessed the effects of light intensity (at two levels: 300 and 750 lux) and CCT (at three levels: 2700 K, 4000 K, and 7800 K) on perceived thermal comfort. Data were analyzed using a two-way Analysis of Variance (ANOVA).
Results: Light intensity, CCT, and their interaction all had a statistically significant effect on nurses' perceived thermal comfort (p < .05). Optimal thermal comfort was reported at a CCT of 4000 K under both 300 and 750 lux intensities. At a warm CCT (2700 K), comfort was maintained at 300 lux but not at 750 lux. Conversely, at a cool CCT (7800 K), the 300 lux condition was perceived as uncomfortable, while the 750 lux condition was reported as comfortable.
Conclusion: This study demonstrates a significant interaction between light intensity and CCT in shaping thermal perception in a clinical context. The findings suggest that lighting design in healthcare facilities must consider both metrics simultaneously to optimize the work environment. A neutral CCT of 4000 K appears to be the most robust for maintaining thermal comfort across different light levels, highlighting its potential as a design standard for healthcare settings.
Keywords: Thermal Comfort, Light Intensity, Correlated Color Temperature (CCT), Nurses, Environmental Design, Healthcare Settings
Type of Study: Original Article |
Subject:
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