Arc shaped discharge chamber for high intensity discharge automotive lamp

An automotive discharge lamp assembly comprising:

• an arc tube having seal portions at first and second ends that are substantially aligned along a first axis and enclosing a discharge chamber disposed between the ends that contains an ionizable fill therein, the discharge chamber having a curvilinear conformation and substantially constant wall thickness along a length thereof that deviates from the first axis;
• and
• first and second electrodes having portions extending at least partially into the discharge chamber from the seal portions at the first and second ends, respectively, for energizing the fill to a discharge state in response to an associated voltage applied thereto.

A method of forming an automotive discharge lamp comprising:

• providing an arc tube having a curvilinear discharge chamber that contains an ionizable fill and with a substantially constant wall thickness axially disposed between coaxial first and second seal ends;
• and
• locating first and second electrodes in the first and second seal ends, respectively, with at least portions thereof extending into the discharge chamber.