A modular system comprising a first component comprising an LED driver and is second component comprising a light engine is described. —the LED driver comprising: a switched mode power converter configured to output a supply current; a first control unit configured to control a switch of the switched mode power converter, thereby controlling the supply current; —the light engine comprising: an LED assembly configured to receive the supply current, the LED) assembly comprising a plurality of LEDs and one or more switches arranged in series or in parallel, with one or more LEDs of the plurality of LEDs, and a second control unit configured to control the one or more switches of the LED assembly, thereby controlling an LED current through the plurality of LEDs; wherein the first control unit is configured to control an amplitude of the supply current, the second control unit is configured to control a duty cycle of the LED current through the plurality of LEDs and wherein the first and second control unit are configured to synchronize to switching operation of the switch of the switched mode power converter with a switching operation of the one or more switches of the light engine.