<p>The lamp has a ceramic discharge vessel with ends sealed by ceramic stoppers with capillaries for electrical lead through and sealed with glass solder and consisting of inner (13) and outer (14) parts. The composite inner part has a core pin (18) to which a coil tube (20) is applied as at least a double layer with an effective diameter of the coil tube wire that is less than or equal to the core pin diameter and fulfills specified conditions.</p>
