HIGH VOLTAGE DISCHARGE LAMP LIGHTING DEVICE AND LIGHT FIXTURE

摘要

The high pressure discharge lamp lighting apparatus (10) includes a power circuit (20, 30, 40, and 50) and a starting circuit (60). The power circuit (20, 30, 40, and 50) includes a pair of output terminals (55 and 56) adapted to be respectively connected to a pair of electrodes (91 and 92) of a high pressure discharge lamp (90). The power circuit (20, 30, 40, and 50) is configured to apply an AC voltage for keeping the high pressure discharge lamp (90) turned on across the pair of the output terminals (55 and 56). The starting circuit (60) is configured to apply a starting pulse voltage across the pair of the electrodes (91 and 92) of the high pressure discharge lamp (90). The starting circuit (60) is configured to have output characteristics of increasing the starting pulse voltage with an increase of a length of a pair of output wires (83) used with connection of the high pressure discharge lamp (90), and of decreasing the starting pulse voltage when the length of the pair of the output wires (83) exceeds a certain value.