MERCURY DISCHARGE LAMP COMPRISING MAGNESIUM HALIDE

摘要

A mercury vapour discharge lamp primarily for producing ultra-violet radiation has an atmosphere which in addition to mercury vapour and an inert gas filling for starting an electron discharge, includes magnesium in the form of a halide. The mercury concentraiton is below 0.5 mg/cc of lamp volume, and the magnesium to mercury weight ratio is between 0.002:1 and 0.1:1. The magnesium is introduced into the lamp as magnesium metal together with another metal halide, preferably a mercuric halide.