1989IEC 60922:1989 Ballasts for discharge lamps (excluding tubular fluorescent lamps); general and safety requirements
IEC 60922:1997 Auxiliaries for lamps - Ballasts for discharge lamps (excluding tubular fluorescent lamps) - General and safety requirements was changed to IEC 61347-1:2000 Lamp controlgear - Part 1: General and safety requirements.
IEC 60922:1997 Auxiliaries for lamps - Ballasts for discharge lamps (excluding tubular fluorescent lamps) - General and safety requirements was changed to IEC 61347-2-9:2000 Lamp controlgear - Part 2-9: Particular requirements for ballasts for discharge lamps (excluding fluorescent lamps).