Method for operating high pressure lamps in the longitudinal resonance mode, associated system and electronic ballast

摘要

The method involves using a high frequency carrier frequency that is frequency modulated with a sweep signal and simultaneously amplitude modulated, whereby a fundamental frequency of the AM signal is first set that is derived from preferably the second longitudinal mode. It involves setting the color temperature for a given power after igniting the lamp and after a waiting period by periodically changing the amplitude modulation between at least two states. Independent claims are also included for the following: (A) a system with a high-pressure discharge lamp and a voltage adapter (B) and a voltage adapter.