| 摘要 |
<p>PROBLEM TO BE SOLVED: To help a person to be relaxed by illumination light rhythm by alternately repeating plural times a long time and a short time of changing light intensity or light color, or light intensity and light color, and controlling illumination light in a breath rhythm in rest. SOLUTION: Preferably, the long time may be set 1.2 to 5 times the short time, the time for increasing the quantity of light may be made shorter than the time for decreasing the quantity of light, and the increase and decrease may be repeated two times or more, and the time for increasing the quantity of light may be made 1.2 to 5 times the time for decreasing the quantity of light. The time for increasing the chroma of color of light is made shorter than the time for decreasing the chroma of color of light, and the increase and decrease may be repeated two times and more, the time for increasing the chroma of color of light may be made 1.2 to 5 times the time for decreasing the chroma of color of light. The quantity of light, color of light, or the quantity of light and the color of light may be changed at the time frequency of 0.05 Hz to 0.6 Hz.</p> |
