| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamp, with a plurality of heat radiation fins formed at the bottom of a light-emitting element installation part, in which strength of the heat radiation fins and heat radiation performance of the installation part are secured, and the degree of flatness of the light-emitting element installation part is secured to efficiently enable heat radiation.SOLUTION: The LED lamp includes a base plate 13 on which a plurality of light-emitting elements are installed, a cylindrical part 2 which extends orthogonally from the center of the base plate 13 and has a base installed at the tip, and a plurality of heat radiation fins 25 which are formed at a rear face 13A of the base plate 13 interposing the cylindrical part 2. The base plate 13 and the heat radiation fins 25 are integrally formed, and thicknesses of the base plate 13 and the heat radiation fins 25 are formed to become gradually thin from an inner circumference toward an outer circumference of the base plate 13. |
