| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED lighting device which can simply change characteristics of irradiation light. <P>SOLUTION: The LED lighting device 1 includes a substrate 10 on which an LED light-emitting element 11 is mounted and an illumination tube 2 in which the substrate 10 is built and which transmits emitting light from the LED light-emitting element 11. The illumination tube 2 is rotatably installed on a base part 3 to which the substrate 10 is fitted, thereby, the substrate 10 and the illumination tube 2 are installed relatively rotatably. By changing the color or thickness of the illumination tube 2 in circumferential direction, characteristics of the transmitted light from the illumination tube 2 is made uneven in the circumferential direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
