SWITCHLESS QUARTZ METAL HALIDE LAMP FOR PROBE-START AND PULSE-START LIGHTING SYSTEMS

摘要

A metal halide (MH) lamp includes an arc tube having end sections and a center portion defining a discharge cavity; an electrode assembly having electrode leads arranged in a symmetric electrode configuration; and a fill contained within the discharge cavity and including a noble gas mixture, mercury, and a salt mix of a metal halide for allowing a starting operation of the MH lamp using a starting voltage of less than 500 volts. The noble gas mixture includes neon from 99.9% to 99.0% and argon from 0.1% to 1.0%. The lamp may also have an outer envelope around the arc tube, where the outer envelope includes neon gas having the same partial pressure as the partial pressure of the neon of the gas mixture.