A lighting circuit, comprising: a switch mode power converter (D1, L1, M1) having a main control switch; a solid state lighting arrangement comprising a lighting unit (10, 12, 14) and a lighting control switch (M2, M3, M4), coupled at the output of the switch mode power converter (D1, L1, M1); a pulse width modulation controller for providing a pulse width modulation control signal (PWM2, PWM3, PWM4) to the lighting control switch (M2, M3, M4) for controlling dimming of the solid state lighting arrangement, the pulse width modulation control signal (PWM2, PWM3, PWM4) having a predetermined frequency and period and comprising pulses during which the lighting unit (10, 12, 14) is activated; and a power converter controller for controlling the main control switch independently of the pulse width modulation control signal (PWM2, PWM3, PWM4), wherein the switch mode power converter (Dl, LI, MI) is adapted to deliver a triangular current waveform (lout) which cycles between upper and lower threshold currents, characterized in that the lighting circuit further comprises: a sync circuit for generating a synchronization signal (SYNC) based on a voltage across the main control switch, wherein the synchronization signal (SYNC) is used to identify a timing at which a predetermined current level within the triangular current waveform (lout) is reached, wherein the pulse width modulation controller is adapted to receive the synchronization signal (SYNC), wherein the pulse width modulation controller comprises a counter arranged to define a timing of the pulse width modulation control signal (PWM2, P2M3, PWM4) such that after a maximum pulse width modulation, PWM, count value has been reached, the pulse width modulation controller is configured to delay the start of each of the pulses until the predetermined current level within the triangular current waveform (lout) is reached. a switch mode power converter (D1, L1, M1) having a main control switch; a solid state lighting arrangement comprising a lighting unit (10, 12, 14) and a lighting control switch (M2, M3, M4), coupled at the output of the switch mode power converter (D1, L1, M1); a pulse width modulation controller for providing a pulse width modulation control signal (PWM2, PWM3, PWM4) to the lighting control switch (M2, M3, M4) for controlling dimming of the solid state lighting arrangement, the pulse width modulation control signal (PWM2, PWM3, PWM4) having a predetermined frequency and period and comprising pulses during which the lighting unit (10, 12, 14) is activated; and a power converter controller for controlling the main control switch independently of the pulse width modulation control signal (PWM2, PWM3, PWM4), wherein the switch mode power converter (Dl, LI, MI) is adapted to deliver a triangular current waveform (lout) which cycles between upper and lower threshold currents, characterized in that the lighting circuit further comprises: a sync circuit for generating a synchronization signal (SYNC) based on a voltage across the main control switch, wherein the synchronization signal (SYNC) is used to identify a timing at which a predetermined current level within the triangular current waveform (lout) is reached, wherein the pulse width modulation controller is adapted to receive the synchronization signal (SYNC), wherein the pulse width modulation controller comprises a counter arranged to define a timing of the pulse width modulation control signal (PWM2, P2M3, PWM4) such that after a maximum pulse width modulation, PWM, count value has been reached, the pulse width modulation controller is configured to delay the start of each of the pulses until the predetermined current level within the triangular current waveform (lout) is reached. a sync circuit for generating a synchronization signal (SYNC) based on a voltage across the main control switch, wherein the synchronization signal (SYNC) is used to identify a timing at which a predetermined current level within the triangular current waveform (lout) is reached, wherein the pulse width modulation controller is adapted to receive the synchronization signal (SYNC), wherein the pulse width modulation controller comprises a counter arranged to define a timing of the pulse width modulation control signal (PWM2, P2M3, PWM4) such that after a maximum pulse width modulation, PWM, count value has been reached, the pulse width modulation controller is configured to delay the start of each of the pulses until the predetermined current level within the triangular current waveform (lout) is reached.