A driving circuit for driving an LED light source, said driving circuit comprising at least: a rectifier for rectifying a phase-cut mains voltage supplied by a phase-cut dimmer; a voltage sensor being directly connected to the rectifier and for detecting an average voltage (Vin) of the rectified phase-cut mains voltage, wherein the input of the voltage sensor being directly connected to the output of the rectifier; and a switched mode power supply for driving said LED light source based on a signal that is output by said voltage sensor, said signal having a voltage level proportional to said average voltage (Vin) and said switched mode power supply being power-supplied by said rectified phase-cut mains voltage; wherein said switched mode power supply comprises a switching device with a limited on time; wherein said switched mode power supply is adapted to control the on time of said switching device as a function of said average voltage (Vin), wherein said switched mode power supply is configured to drive said LED light source by an output of the switched mode power supply; wherein said switched mode power supply is configured for increasingly reducing the on time and thus increasingly reducing the level of the current through the LED light source from its maximum value for emulating incandescent behavior at decreasingly low values of the average voltage (Vin), characterized in that said switched mode power supply is configured for decreasingly reducing the on time and thus decreasingly reducing the level of the current through the LED light source until to reach its maximum level for emulating the respective LED light source dimming curve at increasing high values of the average voltage (Vin). a rectifier for rectifying a phase-cut mains voltage supplied by a phase-cut dimmer; a voltage sensor being directly connected to the rectifier and for detecting an average voltage (Vin) of the rectified phase-cut mains voltage, wherein the input of the voltage sensor being directly connected to the output of the rectifier; and a switched mode power supply for driving said LED light source based on a signal that is output by said voltage sensor, said signal having a voltage level proportional to said average voltage (Vin) and said switched mode power supply being power-supplied by said rectified phase-cut mains voltage; wherein said switched mode power supply comprises a switching device with a limited on time; wherein said switched mode power supply is adapted to control the on time of said switching device as a function of said average voltage (Vin), wherein said switched mode power supply is configured to drive said LED light source by an output of the switched mode power supply; wherein said switched mode power supply is configured for increasingly reducing the on time and thus increasingly reducing the level of the current through the LED light source from its maximum value for emulating incandescent behavior at decreasingly low values of the average voltage (Vin), characterized in that said switched mode power supply is configured for decreasingly reducing the on time and thus decreasingly reducing the level of the current through the LED light source until to reach its maximum level for emulating the respective LED light source dimming curve at increasing high values of the average voltage (Vin).