| 摘要 |
A decoration device (6) includes at least one light source (12) emitting light having directivity, a diffusion member (11a) having a diffuse reflective surface for diffusely reflecting light from the light source (12), and a light guide member (13) arranged around the diffusion member at a position anterior to the diffuse reflective surface. The light guide member (13) includes at least one incident surface (13a) facing the at least one light source (12) and an end face (13d) facing the diffusion member of the light guide member (13), wherein the light guide member (13) causes light from the light source (12), the light entering the light guide member (13) through the incident surface (13a), to propagate so as to spread within the light guide member (13), so that the light from the light source (12) exits from an area of the end face (13d), the area being larger than the incident surface (13a), toward the diffuse reflective surface (11a).
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