Patent ID: 6404122
Filing Date: 2002-06-11
Classification: H01J

Abstract:
A low-pressure mercury vapor discharge lamp provided with a discharge vessel (10),which discharge vessel (10; 210) encloses a discharge space (11; 211) containing a filling of mercury and a rare gas in a gastight manner, which discharge vessel (10; 210) contains an amalgam (63; 263) which is in communication with the discharge space (11), and in which the low-pressure mercury vapor discharge lamp comprises discharge means (41a, 41b; 234) for maintaining an electric discharge in the discharge vessel (10; 210), characterized in that the amalgam (63; 263) has a bismuth-tin ratio (Bi:Sn) in the range of 20:80&lE;Bi:Sn&lE;80:20, a lead content (Pb) in the range of 0.7&lE;Pb&lE;12 at % and a mercury content (Hg) in the range of 0.05&lE;Hg&lE;2 at %.