| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal lamp which saves more electric power and has a longer service life than an incandescent lamp while being used as a signal lamp of a traffic signal lamp device, and moreover which can be mounted and demounted in a socket of the incandescent lamp. SOLUTION: A forward illumination light emitting diode group 60 and plural reward illumination light emitting diode groups 80, 80 are arranged coaxially. In the group 60, plural same colored light emitting diodes 90, 90 are arranged to make those luminous flux face forward. In the groups 80, 80, the plural same colored light emitting diodes 90, 90 are arranged in an axial symmetry to make those luminous flux face outside at the rear side of the forward illumination light emitting diode group 60. Also, in the groups 80, 80, respective optical axes are arranged so as to converge into a focus of a reflection mirror. A rectifier 102 and a voltage regulator 103 are assembled between an alternating current power supply connection plug terminal 74 and a light emitting diode terminal. |
