Dimmable magnesium halide lamp

摘要

A high pressure ceramic metal halide lamp (10) having dimming characteristics with a fill composition including MgI2 and/or MgBr2, said lamp (10) comprising a discharge vessel (20) formed of a material resistant to sodium at high temperature; discharge electrodes (33a,33b) positioned at opposite ends within the discharge vessel (20); and a fill including mercury and metal halides having at least one of MgI2 and MgBr2 in the discharge vessel (20) and which substantially doesn't include Thallium therein.