LAMPADA ELETTRICA A SCARICA CON BULBO CERAMICO, DOTATA DI UN ELETTRODO DI ACCENSIONE FATTO PASSARE ATTRAVERSO IL FORO DELLA SUPERFICIE DEL MANTELLO

The invention relates to an electric discharge lamp the discharge space of which is closed by ceramic closing elements (2) and a ceramic envelope (1) permeableto light. Current feeding electrodes (3) led through the ceramic closing elements (2) supply electric current for the lamp. A wire-shaped ignition electrode (4) is led through a bore in the discharge envelope (1), or in the surface of the ceramic element (2) closing the discharge tube, in the vicinity of the tip of the main electrode (3). In this way, a concentrated electric field (6) may be achieved between the ignition electrode (4) and the a main electrode (3) and the ignition discharge will start from the tip of the main electrode (3).