Patent ID: 7768208

Claim:
A discharge lamp apparatus for lighting a discharge lamp, comprising: a lamp housing in which the discharge lamp is housed; a ballast having a ballast housing connected to a side wall of the lamp housing outside of the lamp housing, the ballast having a ballast circuit board housed in the ballast housing; a sealing member provided between said side wall of the lamp housing and an adjacent side wall of the ballast housing for preventing the entry of water from outside; a connector connected to the ballast housing for electrically connecting the discharge lamp and the ballast, the connector being located in a vertically lower part of the ballast housing, the connector forming a ventilation hole for allowing communication between a ballast housing and the lamp housing; and a partition wall extending substantially horizontally from said side wall of the ballast housing, between the ballast circuit board and the ballast connector, for inhibiting movement of water vapor condensation toward the ballast circuit board, wherein: the ballast circuit board is fixed to the ballast housing in such a manner as to be spaced from the ballast connector in a vertical direction, and the ballast circuit board is located in a vertically upper part of the ballast housing and is located at a position vertically higher than the ventilation hole of the connector in the ballast housing.