| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device having a simple structure and making light distribution easily variable.SOLUTION: An LED lighting device 1 includes: an LED module 19 which has a substrate 23, a first LED group 28 where a plurality of LEDs 24 are provided on the side of one surface 23a of the substrate 23 in serial connection and second LED groups 29, 29 where the plurality of LED 24 are provided to be serially connected and connected to the first LED group 28 in an inverse-parallel state, and in which the first and second LED groups 28, 29, are located on the substrate 23 at non-rotationally symmetric positions; a device body 2 where the LED module 19 is disposed; and a lighting-up device 4 outputting alternating-current voltage to the first and second LED groups 28, 29, 29, and lighting up the first and second LED groups 28, 29, 29 alternately and also in different output ratio. |
