| 摘要 |
PROBLEM TO BE SOLVED: To achieve an adequate operation when a light-emitting element part is disconnected.SOLUTION: In a case that a lighting fixture is equipped with first to n-th light-emitting element parts, which are respectively so configured as to have one or more semiconductor light-emitting elements and are connected to one another in a parallel relationship, and a power consumption part connected to the plural light-emitting element parts in parallel, a switch part for power consumption which switches between on and off of current supply to the power consumption part is provided. In a case that disconnection is detected by any one of first to n-th disconnection detection parts which respectively correspond to the first to n-th light-emitting element parts, a switch control part, which so controls the switch part for power consumption as to be switched off, is provided. Thus, current supply to the power consumption part is stopped during disconnection, while current supply to the light-emitting element part which can emit light is continued, whereby light-emitting action is maintained. |
