I did not believe it, but the Osram LED lamp Superstar Classic A75 advanced 13.5W can not actually run on EIB / KNX dimmers: At start-up / Programming the system they will flicker several times, but obviously were able to lamp and EIB / KNX Dimmer can not agree on an operating point, and then the lamp lies after the "train" no longer turn on. Too bad I had to send back - and operate the light now with a I Glow ESL.