User talk:Jojo807

A vehicle lighting apparatus comprising a reflector (11) having an opening and accommodating a metal halide lamp; wherein the metal halide lamp comprises a light-transmitting discharge vessel (1) having a discharge space portion (1c), a sealed portion (1a1), a pair of electrodes (1b) projecting into the discharge space (1c); an ionizable filling in the discharge space (1c), which contains xenon (Xe) gas and a metal halide including at least sodium (Na) or scandium (Sc) and does not substantially include mercury (Hg); and a conductive wire (3) connected electrically to each of the electrodes (1b), the conductive wires (3) extending from the discharge vessel (1); a front cover (12) attached to the opening of the reflector (11); and a ballast; said vehicle lighting apparatus being characterized in that said metal halide lamp is constructed and arranged such that a D/L ratio is in a range of about 0.25 to about 1.5 and a t/L ratio being in a range of about 0.16 to about 1.1, wherein L is an interspace of tips of the electrodes (1b), D is a maximum inner diameter of the discharge vessel (1), and t is a maximum wall thickness of the discharge space portion (1c); and said ballast is constructed and arranged to have a relation between a filling pressure X (atm) of the xenon (Xe) and a maximum electrical power AA (W) that is in accordance with the following formula: 3 < X < 15, AA ≥ -2.5X + 102.5,wherein the maximum electrical power AA (W) is a maximum wattage supplied to the metal halide lamp in four seconds after the lamp turned on