FIELD: electrical engineering. SUBSTANCE: in filling composition there are used additives to provide burner with halogenides of sodium and calcium in the amount from 4 up to 16 mole μmole/cm3 and from 5 up to 32 mole μmole/cm3 correspondingly. Molar ratio of amount of sodium to amount of calcium is selected within 0.48-3.0 and pressure of inert gas amounts to 40.0 to 200 kPa. EFFECT: increased efficiency and prolonged service life. 1 tbl, 1 dwg
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