| 摘要 |
PROBLEM TO BE SOLVED: To provide a sunbeam lighting device capable of uniformly distributing light in a wide range in an indoor space while reducing light loss on a light distribution plate of a main body. SOLUTION: This lighting device is provided with a lighting unit main body on an opening in a roof or wall, and parallel light of sunbeam from the lighting unit main body is distributed through a main body light distribution plate 7 and an indoor light distribution plate 8 into an indoor space. In this case, the main body light distribution plate 7 is composed so that parallel light is refracted for a specified angle to be diffused having directivity. Otherwise, the parallel light is reflected forward at a specified angle to be diffused having directivity. |
