Effect of heart rate, correlated colour temperature and illuminance on human visual perception under LED lighting environments

Lighting environments with different correlated colour temperatures (CCTs) and illuminance levels not only give different subjective perceptions but also affect physiological parameters. However, previous studies have rarely considered the interaction between participants' physiological state and psychological feelings under different lighting environments. To address this gap, this study aimed to investigate the impact of different CCTs (6500 K and 3000 K) and illuminances (300 lx and 900 lx) on participants' visual perception, considering heart rate changes as a key variable. Through physiological and psychological questionnaire assessments, it was found that changes in heart rate significantly influenced participants' subjective evaluations. Heart rate variations affected participants' physiological perception of the lighting environment, such as respiration and thermal sensation. The results of this study can be used as a reference for future indoor lighting design, providing a scientific basis for creating a more comfortable and efficient lighting environment.