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INITIAL STUDY OF THE EFFECTS OF CHROMATIC LIGHT WITH CONTROLLED SPECTRAL

DISTRIBUTION ON CREATIVITY AND ALERTNESS


Takuma Hashimoto, Masatoshi Ishigane, Kohta Shiono and Hiroshi Takahashi


Department of Electrical & Electronic Engineering, Kanagawa Institute of Technology, Japan


*Corresponding author: Hiroshi Takahashi, htakahashi@ele.kanagawa-it.ac.jp


Keywords: Chromatic light, Spectral distribution, Creativity, Alertness, Dominant wavelength

Poster presentation video: https://youtu.be/iuvzsC4jf-I




In recent years, LED lighting has become popular as illumination light, and various light colors have become available by controlling the light amounts of red, green, and blue, which are the three primary colors of light. It is also believed that chromatic illumination has physical and psychological effects on humans. For example, red lights have an awakening effect. Some studies have shown that long-wavelength light increases attention. Other studies have reported that chromatic lighting affects cognitive performance. However, the impact of chromatic lighting on creativity remains unclear. The purpose of this study is to investigate the effects of different spectral distributions and the same dominant wavelength on creativity and alertness. The light colors used in this study were white (W), red (R), green (G), and blue (B), and for R, G, and B, two kinds of light colors with different spectral distributions were prepared so that the dominant wavelengths were as close as possible, for a total of seven different light source conditions. In this study, we conducted a creativity test (a task to create new applications) referring to the TTCT creativity test. The evaluation method was evaluated from four viewpoints of fluency, flexibility, originality and concreteness, and each was evaluated quantitatively and qualitatively. In addition, by measuring the brain waves of the subjects during the experiment, they compared the changes in the brain waves before and after the experiment. As a result, the quantitative evaluation of the creativity test showed that the evaluation of green light was low in flexibility and concreteness, but the qualitative evaluation showed high evaluation. As for the difference in spectral distribution, it was shown that, except for some conditions, the light color with more short- wavelength components among the similar colors had a higher evaluation. On the other hand, it was shown that the alertness increased in the light color with more long-wavelength component.



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