Metal halide lamps

摘要

A high-efficiency, high-intensity metal halide lamp having a discharge chamber having a discharge region. Electrodes are provided in the discharge region spaced apart by a distance L e with an average inside diameter equal to D so they have a selected ratio. Ionizable materials are provided in this chamber involving a noble gas, one or more halides, and mercury in an amount sufficiently small so as to result in a relatively low maximum voltage drop between the electrodes during lamp operation.