| 摘要 |
The invention relates to a lighting device comprising: a heat sink (400); a light source (300) on the heat sink (400); a cover (100) to the heat sink (400) and comprising an upper portion (130) on the light source (300) and a lower portion (110) supporting the upper portion (130); and a reflective plate (200) in the lower portion (110) and having an opening (210) through which a part of light from the light source (300) passes, characterized in that: the reflective plate (200) comprises a flat surface, the reflective plate (200) has a plurality of holes (250'), the holes (250') being smaller than the opening (210), and a luminous flux between 130° to 180° based on a central axis of the cover (100) is larger than 10 % of a total luminous flux of the lighting device. |
