Method, apparatus and system for efficient driving a lighting means. In accordance with an embodiment of the present invention, there is provided a synchronous load for a lighting system, wherein the lighting system is fed by an AC supply that is potentially produced by a dimmer. The synchronous load is configured to load the AC supply only if the AC supply is found to be actually produced by a dimmer. In this case, the loading period comprises only the times when the AC supply voltage is lower than a given threshold and when current oscillation occurs.