A lighting circuit comprising: - a lighting arrangement comprising a plurality of strings connected in parallel with each other, the plurality of strings comprising a first string and a second string (40; 50), the first string comprising a first light source and a first disable switch , the first light source being connected in series with the first disable switch , the second string (40; 50) comprising a second light source (400;500) and a second disable switch , the second light source (400;500) being connected in series with the second disable switch , the first light source and the second light source (400;500) having different color points and wherein a voltage across the first string and the second string (40; 50) is the same; - a current driver adapted to deliver a required average output current (Iconverter) to the lighting arrangement, the current driver having an input for receiving a current driver setting (PWM_current_setpoint); - a controller adapted to control a duty cycle of the first disable switch (PWM white) and a duty cycle of the second disable switch (PWM_dimtone) thereby to control a color or color temperature setting of the lighting arrangement, and adapted to provide the current driver setting (PWM current setpoint) to the current driver thereby to control a dimming level of the lighting arrangement, characterized in that the controller comprises a control interface configured to receive color temperature and brightness commands, wherein the controller is adapted to translate the color temperature and brightness commands into a PWM signal for the current driver and a PWM signal for each LED channel, and wherein the controller is adapted to derive the required average output current (Iconverter) from the current driver based on the controlled duty cycle (PWM_white) of the first disable switch (PWM white) and the controlled duty cycle of the second disable switch (PWM_dimtone) and the dimming level of the lighting arrangement, and to derive the current driver setting (PWM_current_setpoint) from the required average output current (Iconverter), such that each string of the plurality of strings has a light source utilization factor, wherein the sum of the light source utilization factors is larger than 100%, wherein the utilization factor of a light source is a ratio of a time wherein the light source is emitting light and a time wherein the light source is not emitting light. - a lighting arrangement comprising a plurality of strings connected in parallel with each other, the plurality of strings comprising a first string and a second string (40; 50), the first string comprising a first light source and a first disable switch , the first light source being connected in series with the first disable switch , the second string (40; 50) comprising a second light source (400;500) and a second disable switch , the second light source (400;500) being connected in series with the second disable switch , the first light source and the second light source (400;500) having different color points and wherein a voltage across the first string and the second string (40; 50) is the same; - a current driver adapted to deliver a required average output current (Iconverter) to the lighting arrangement, the current driver having an input for receiving a current driver setting (PWM_current_setpoint); - a controller adapted to control a duty cycle of the first disable switch (PWM white) and a duty cycle of the second disable switch (PWM_dimtone) thereby to control a color or color temperature setting of the lighting arrangement, and adapted to provide the current driver setting (PWM current setpoint) to the current driver thereby to control a dimming level of the lighting arrangement, <EOS>