GASEOUS-DISCHARGE LAMP Russian patent published in 2002 - IPC

FIELD: electrical engineering; general-purpose and special lighting fixtures. SUBSTANCE: gaseous- discharge lamp that has envelope made of optically transparent material and accommodates encapsulated sintered electrodes whose high-melting metal rods carry sintered activated material is characterized in that diameter of rod and its length between encapsulation area in envelope and sintered activated material, as well as rated current of lamp are chosen to meet following relations: where I is rated current of lamp, A; D is diameter of sintered activated material, mm; d is diameter of sintered electrode rod, mm; L is length of sintered activated material, mm; L₁ is length of rod between encapsulation area and sintered material, mm. EFFECT: enhanced service life of lamp due to optimal position of activated material on electrode rod. 2 dwg, 1 tbl