Electrical and electronic control devices for operating lamps, small transformers, chokes, light-emitting diodes and electroluminescent film; magnetic and electronic ballasts and igniters for fluorescent lamps; dimmable control gear for fluorescent lamps, gas discharge lamps and organic and inorganic light-emitting diodes; magnetic and electronic transformers, especially for low-voltage lamps and organic and inorganic light-emitting diodes; electronic circuit boards for operating organic and ...