The invention is both a system for supplying high frequency alternating current to gas discharge lamps, such as fluorescent lamps, and the like and a unit that can be placed in or adjacent to a lighting fixture to convert a direct current supply into high frequency AC and also provide the ballast needed...http://www.google.es/patents/US4508996?utm_source=gb-gplus-sharePatente US4508996 - High frequency supply system for gas discharge lamps and electronic ballast therefor
High frequency supply system for gas discharge lamps and electronic ballast ...
