| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamp with high efficiency which has excellent heat radiation properties, which can deal with large light flux and which achieves omnidirectional light distribution.SOLUTION: A lamp 1G includes: a plurality of side surface light source parts 3 having a side surface light source substrate 4 on which light emitting elements (LED light sources 5) are mounted; and an end surface light source part 10 having an end surface light source substrate 11 mounted with the light emitting elements. The end surface light source part 10 is arranged at a tip part of the lamp 1G with the light emitting element side surface of the end surface light source substrate 11 facing the tip side of the lamp 1G. The plurality of side surface light source parts 3 are arranged at equal intervals in the circumferential direction of the lamp 1G with the light emitting element side surface of the side surface light source substrate 4 facing an outer peripheral side of the lamp 1G. Each side surface light source part 3 has a shape in which length of the lamp 1G in the center line direction is longer than the length orthogonal to the line, and a gap 17 which becomes a flow passage of air is provided between the side surface light source parts 3 adjacent to each other. |
