With the suitable flush-mounted inserts the comfort timer control element of the roller blind/Venetian blind control unit can be converted to a Busch-Timer® for lighting control. Then the timer operates, for example, in combination with a movement detector or a dimmer. When combined with LED dimmers, the Busch-Universal master dimmer or Busch-Memory touch-type controller, the brightness of the lighting can be adjusted for each turn-on time.