| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminaire located over a road area or a sidewalk so that a desired light distribution can be realized to reduce the size of illuminance spots, and to simply control a light distribution by moving a reflection plate back and forth based on the length of a light source. SOLUTION: This luminaire includes a light source 4 disposed in the inside of a luminaire main body 1. In an upper part of the light source 4, an upper reflection plate 6 having a projection longitudinally projecting into the center of the light source 4 is provided, and a paraboloidal reflection plate 7 is disposed symmetrically with respect to the center of the light source 4, and a rear reflection plate 8 is disposed in the back part of the light source 4. In any case, the upper reflection plate 6 and the paraboloidal reflection plate 7 are constituted so that a surface of reflection material can be used as a diffusion surface. Moreover, the reflection plates are respectively moved back and forth based on the length of the light source 4 to irradiate the predetermined irradiation light in a desired direction. |
