WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7150

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Subject: search.filters.subject.Cognitive Performance

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  • Article
    Combined Impacts of Glazing Types and Dynamic Led Lighting on Human Centric Lighting Requirements
    (Elsevier, 2025) Kose, F. Busra; Kazanasmaz, Z. Tugce; Tayfur, Gokmen; Duran, H. Engin
    As modern offices increasingly integrate smart lighting systems, understanding their combined impact with daylight on human well-being is essential. This study aims to examine how glazing properties and dynamic LED lighting jointly influence circadian metrics, cognitive performance, and subjective evaluations in office environments. An experimental methodology was applied, combining lighting measurements, circadian calculations, cognitive performance tests, surveys, and statistical analyses. Results show that illuminance below 300 lux failed to meet circadian thresholds, while levels above 750 lux enhanced circadian activation, comfort, satisfaction, and mood. Optimal visual performance occurred at 300-750 lux, and LED colour temperatures between 4000 and 5000K yielded the highest circadian-effective values, supporting faster cognitive processing, better memory, and greater comfort while reducing glare and sleepiness. Glazing analysis revealed that tinted and photovoltaic types substantially altered indoor spectrum and attenuated circadian support, whereas clear and neutral low-e glazing preserved spectral balance. Interaction effects confirmed that both light intensity and spectrum must be considered together to achieve biological and perceptual benefits. Demographic influences were minimal, and useradjustable LEDs further enhanced comfort and satisfaction. This study provides novel evidence on the integrated role of glazing and dynamic lighting, offering practical guidance for office design that balances energy efficiency with occupant health, comfort, and productivity.
  • Review
    Citation - WoS: 4
    Citation - Scopus: 7
    Optimizing Lighting Design in Educational Settings for Enhanced Cognitive Performance: a Literature Review
    (Elsevier Science Sa, 2025) Celik, Meric; Didikoglu, Altug; Kazanasmaz, Tugce
    Lighting has more functions than simply illuminating spaces. For humans, light is the main signal that aligns our body's internal clock, regulating circadian rhythms. This process instructs our bodies to wake up in the morning, become alert during the day, and feel sleepy at night. Disruption of these rhythms can impact neurological and psychiatric health, including cognitive performance. We can utilize light for mood improvements and better cognitive performance to create a suitable learning environment for students in educational buildings. These non-visual effects of light need to be considered from the beginning of the design process, making an interdisciplinary effort necessary. Even with adequate light and dark, the human eye reacts differently under various conditions, influenced by light's photometric and colorimetric properties. While natural sunlight is ideal for aligning with our biological clock, it is not always sufficient, making artificial lighting essential indoors. LED technology offers promising solutions, catering to our non-visual needs in the absence of natural light and providing energy efficiency. This study reviews the literature that includes students' cognitive performance and well-being, energy efficiency, running costs, and environment-related issues such as light pollution. It aims to explore the impact of lighting design in learning environments.