| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lamp of a straight tube shape capable of using a glass tube for a fluorescent tube.SOLUTION: An illumination lamp 50 is provided with a glass tube 56 having a cylindrical straight tube section 81 with a prescribed inner tube diameter A and neck sections 82 which are formed at both ends of the straight tube section and have inner neck diameters B smaller than the inner tube diameter A of the straight tube section, a substrate 52 mounted with a light-emitting diode, a heat sink 54 which is fitted with the substrate and extends to the straight tube section through the longitudinal direction of the glass tube, and a base 55 which is fitted to the end of the glass tube and fixes the end of the heat sink. The base 55 has a projection 83 which projects up to the straight tube section 81 over the neck section 82 toward the center in the longitudinal direction of the glass tube, and the heat sink 54 is arranged in the straight tube section 81, and the end of the heat sink is fixed to the end of the projection 83. |
