High-pressure mercury vapour discharge lamp

Details High-pressure mercury vapour discharge lamp High-pressure mercury vapour discharge lamp

H - Electricity

01

J

313/138

H01J 61/20 (2006.01) H01J 61/12 (2006.01)

Patent

CA 1169470

PHN 9849 11 18-9-1981 ABSTRACT: "High-pressure mercury vapour discharge lamp." High-pressure mercury vapour discharge lamp con- taining rare gas, mercury, sodium halide and at least one halide of at least one of the rare earth metals Ce, Pr, Nd and Lu. The lamp is suitable for a nominal power in the range from 10 to 2000 W. The molar ratio of rare earth metal to sodium, Ln : Na, has a value from 1 : 20 to 1 : 1 and the quantity of mercury, A, has a value from 2 to 100 mg/cm3. Ln : Na and A have in these ranges a low value for lamps having a high value of the power, and higher values according as the nominal power of the lamp has a-lower value. Figure 2.

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