13 February 2007 Warm white LEDs lighting over Ra=95 and its applications
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We have for the first time developed warm white LEDs lighting using a combination of near ultraviolet LED and three-band (red, green and blue) white phosphors. This LED has the average color-rendering index Ra=96. Moreover, special color-rendering index R9 (red) and R15 (face color of Japanese) are estimated to be 95 and 97, respectively. We will describe the results of evaluation on the medical lighting applications such as operation, treatment and endoscope experiments, application to the LED fashions and application to the Japanese antique art (ink painting) lighting.
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Katsuya Kobashi, Katsuya Kobashi, Tsunemasa Taguchi, Tsunemasa Taguchi, "Warm white LEDs lighting over Ra=95 and its applications", Proc. SPIE 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI, 648610 (13 February 2007); doi: 10.1117/12.698197; https://doi.org/10.1117/12.698197

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