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Effects of Correlated Colour Temperature of LED Light on Visual Sensation, Perception, and Cognitive Performance in a Classroom Lighting Environment

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  • Wonyoung Yang

    (Department of Architectural Engineering, Hanyang University, Seoul 04763, Korea)

  • Jin Yong Jeon

    (Department of Architectural Engineering, Hanyang University, Seoul 04763, Korea)

Abstract

Illuminance levels have been standardized and regulated for many purposes. However, the effects of correlated colour temperature of lighting have received little attention in the field. This study investigated the effects of correlated colour temperature of lighting on the brightness sensation, lighting perception, and cognitive performance of 60 students under ambient light emitting diodes (LED) lighting conditions (CCT: 3000 K, 4000 K, and 5700 K; illuminance: 650 lx and 1050 lx) in an actual university classroom. An increase in correlated colour temperature (CCT) led to an increase in brightness sensation. However, increased CCT did not linearly increase lighting comfort. A CCT of 4000 K was considered as the optimum for lighting comfort in educational settings. But in comparison to comfort, higher levels of perceptual properties, satisfaction and acceptance were not affected by CCT from 3000 K to 5700 K. Scores on the working memory test were significantly affected by CCT and illuminance level in men only. The effects of gender appeared in glare sensation and the working memory test. Women were sensitive to glare sensation and had a lower mean score in the working memory test than men. Optimal CCT is more beneficial than increased illuminance in moderately ambient indoor lighting, as it provides better lighting comfort. Further research can look at the long-term effects of CCT on lighting perception depending on brain processing levels and more diverse and in-depth cognitive performance.

Suggested Citation

  • Wonyoung Yang & Jin Yong Jeon, 2020. "Effects of Correlated Colour Temperature of LED Light on Visual Sensation, Perception, and Cognitive Performance in a Classroom Lighting Environment," Sustainability, MDPI, vol. 12(10), pages 1-16, May.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:10:p:4051-:d:358481
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    References listed on IDEAS

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    1. Wonyoung Yang & Hyeun Jun Moon & Jin Yong Jeon, 2019. "Comparison of Response Scales as Measures of Indoor Environmental Perception in Combined Thermal and Acoustic Conditions," Sustainability, MDPI, vol. 11(14), pages 1-26, July.
    2. Ji-Hyun Lee & Jin Woo Moon & Sooyoung Kim, 2014. "Analysis of Occupants’ Visual Perception to Refine Indoor Lighting Environment for Office Tasks," Energies, MDPI, vol. 7(7), pages 1-24, June.
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    Cited by:

    1. María Luisa Nolé & Juan Luis Higuera-Trujillo & Carmen Llinares, 2021. "Effects of Classroom Design on the Memory of University Students: From a Gender Perspective," IJERPH, MDPI, vol. 18(17), pages 1-17, September.
    2. Xiaoyun Fu & Di Feng & Xu Jiang & Tingting Wu, 2023. "The Effect of Correlated Color Temperature and Illumination Level of LED Lighting on Visual Comfort during Sustained Attention Activities," Sustainability, MDPI, vol. 15(4), pages 1-14, February.
    3. Na Yu & Yue Lv & Xiaorong Liu & Shuai Jiang & Huixuan Xie & Xiaofan Zhang & Ke Xu, 2023. "Impact of Correlated Color Temperature on Visitors’ Perception and Preference in Virtual Reality Museum Exhibitions," IJERPH, MDPI, vol. 20(4), pages 1-18, February.
    4. Massimiliano Masullo & Federico Cioffi & Jian Li & Luigi Maffei & Giovanni Ciampi & Sergio Sibilio & Michelangelo Scorpio, 2023. "Urban Park Lighting Quality Perception: An Immersive Virtual Reality Experiment," Sustainability, MDPI, vol. 15(3), pages 1-15, January.

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