Method for regulating an output voltage (V 0) at an output (V out) of a current-controlled voltage regulator (VREG) for supplying a lighting device comprising at least two circuits (IC1, IC2), each of these at least two circuits (IC1, IC2) supplying at least one LED group (LED 1, LED 2, LED 3) with electrical energy in each case by means of a current source in the form of an LED driver (LED DRV) which is part of the at least two circuits (IC1, IC2) and is assigned to the respective LED group, comprising the steps of - Generating the output voltage (V 0) at the output (V out) of the voltage regulator (VREG) by means of the current-controlled voltage regulator (VREG); - Setting an LED group current (I LED1, I LED2) in each case by means of the at least one LED group (LED 1, LED 2) by means of the current source (LED DRV) assigned to this LED group (LED 1, LED 2) of a first circuit; - Setting an LED group current (I LED3) in each case by means of the at least one LED group (LED 3) by means of the current source (LED DRV) of a second circuit assigned to this LED group (LEDs); - Adjustment of an LED group current in each case by the at least one LED group by means of the current source (LED DRV) of a further circuit assigned to this LED group if the lighting device comprises more than two circuits; - detecting, by means of a measuring means in each circuit (IC1, IC2), a respective voltage drop across the respective current sources (LED DRV) of the LED groups (LED 1, LED 2, LED 3) as respective voltage drop values, wherein in each circuit (IC1, IC2) for each current source (LED DRV) one voltage drop value is determined for each current source (LED DRV); - selecting, by means of a local regulator in each circuit (IC1, IC2), a respective voltage drop value from the voltage drop values of the current sources (LED DRV) of the respective circuit (IC1, IC2) as a characteristic voltage drop value of this circuit (IC1, IC2); - drawing, by means of a driver in each circuit (IC1, IC2), a respective draw current of the respective circuit (IC1, IC2) from a control bus by means of each of these circuits (IC1, IC2), wherein the amount of the respective draw current of the respective circuit (IC1, IC2) being dependent on the deviation of the characteristic voltage drop value of the corresponding circuit (IC1, IC2) from a setpoint value in a linear fashion, and wherein, by feeding into the control bus, all withdrawal currents and at least one constant bias current (I Bias) are summed to form a total current (I S), and - Regulation by means of feedback of the output voltage (V 0) of the voltage regulator (VREG) at its output (V out) as a function of the total current (I S). - Generating the output voltage (V 0) at the output (V out) of the voltage regulator (VREG) by means of the current-controlled voltage regulator (VREG); - Setting an LED group current (I LED1, I LED2) in each case by means of the at least one LED group (LED 1, LED 2) by means of the current source (LED DRV) assigned to this LED group (LED 1, LED 2) of a first circuit; - Setting an LED group current (I LED3) in each case by means of the at least one LED group (LED 3) by means of the current source (LED DRV) of a second circuit assigned to this LED group (LEDs); - Adjustment of an LED group current in each case by the at least one LED group by means of the current source (LED DRV) of a further circuit assigned to this LED group if the lighting device comprises more than two circuits; - detecting, by means of a measuring means in each circuit (IC1, IC2), a respective voltage drop across the respective current sources (LED DRV) of the LED groups (LED 1, LED 2, LED 3) as respective voltage drop values, wherein in each circuit (IC1, IC2) for each current source (LED DRV) one voltage drop value is determined for each current source (LED DRV); - selecting, by means of a local regulator in each circuit (IC1, IC2), a respective voltage drop value from the voltage drop values of the current sources (LED DRV) of the respective circuit (IC1, IC2) as a characteristic voltage drop value of this circuit (IC1, IC2); - drawing, by means of a driver in each circuit (IC1, IC2), a respective draw current of the respective circuit (IC1, IC2) from a control bus by means of each of these circuits (IC1, IC2), wherein the amount of the respective draw current of the respective circuit (IC1, IC2) being dependent on the deviation of the characteristic voltage drop value of the corresponding circuit (IC1, IC2) from a setpoint value in a linear fashion, and wherein, by feeding into the control bus, all withdrawal currents and at least one constant bias current (I Bias) are summed to form a total current (I S), and - Regulation by means of feedback of the output voltage (V 0) of the voltage regulator (VREG) at its output (V out) as a function of the total current (I S).