| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiency while suppressing glare.SOLUTION: A second reflection part (first side wall 510) inclines so as to approach to a mounting surface (wall surface) as getting away from a light source (lower side LED module 3). The second reflection part (first side wall 510) is formed so that the width dimension along the light axis is smaller than the width dimension along the light axis of a first reflection part (second side wall 511). As a result, the glare can be suppressed by the second reflection part (first side wall 510) and the light reflected at the second reflection part can be reflected at the first reflection part (second side wall 511), so that efficiency is improved. |
