The purpose of this study was to design spectral power distributions of light sources while considering the color appearance and preservation of artwork under low illuminance by using a “color quality index” called Gx(E). One of the spectral distributions obtained from theoretical calculations was reproduced by using a lighting device with six types of monochromatic LEDs. Subjective evaluation experiments were conducted under various light sources, and the prediction accuracy of Gx(E) was verified.
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Nakajima et al. (2019) studied this question.
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