| 摘要 |
PROBLEM TO BE SOLVED: To enable a lighting fixture for a tunnel to secure general uniformity of illuminance, average road surface luminance and vertical plane illuminance well-balancedly to effectively perform pro-beam illumination.SOLUTION: The lighting fixture 1 is provided with a light source part 4 equipped with an LED 2 and an optical lens 3 controlling distribution of light from the LED 2, a fixture body 5 with an opening 50, and a translucent member 6 for blocking the opening 50. The fixture body 5 has its face opposed to the opening 50 as a fixture-mounting face 51, and the opening 50 is formed to be inclined to the fixture-mounting face 51. The lighting fixture 1 can positively illuminate the rear face of a foregoing vehicle as the fixture-mounting face 51 is mounted on a side wall of the tunnel with the opening 50 arranged directed toward a travelling direction of vehicles to effectively perform the pro-beam illumination. Moreover, with the use of the LED 2 and the optical lens 3, the general uniformity of illuminance, the average road-surface luminance and the vertical plane illumination can be secured well-balancedly. |
