| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of enhancing visibility under a mesopic vision environment. <P>SOLUTION: A light-emitting part 12 equipped to a lighting device 10 to be arranged in a space where brightness is 10 cd/m<SP POS="POST">2</SP>or lower or can be 10 cd/m<SP POS="POST">2</SP>or lower is constructed so that a half value of a short wavelength side of a second peak wavelength may exist in a short wavelength side rather than a peak wavelength of a scotopic vision sensitivity and the light-emitting part may be arranged at a height of 2-15m and an average horizontal plane luminance in an irradiated face may become 1-30 lx. <P>COPYRIGHT: (C)2012,JPO&INPIT |
