GAS DISCHARGE LAMP

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A gas discharge lamp comprising a substantially cylindrical discharge vessel, containing an ionizable filling comprising a rare gas and a salt, and first and second electrodes positioned near a first and a second end of the discharge vessel, respectively, wherein the first end of the discharge vessel has a cylindrically shaped side wall and a substantially disc-shaped end wall near the tip of the first electrode, wherein the second end of the discharge vessel has a tapered side wall near the tip of the second electrode, and wherein the tapered side wall has a substantially constant thickness.