Circuit arrangement for the generation of a reference voltage (U ref) for the power supply of an LED arrangement, wherein the power supply, from an input voltage (U B), delivers a supply current (I S) for the LED arrangement, which is determined by the level of the reference voltage, wherein the circuit arrangement has: a first voltage divider (R1/R2), consisting of two ohmic resistors (R1, R2), which is connected to a constant supply voltage (U V), and a second voltage divider (R3/R4), consisting of two ohmic resistors (R3, R4), which is connected to the input voltage (U B) of the power supply, characterised in that, the circuit arrangement also has: a third voltage divider (R5/R6), which consists of an ohmic resistor and a temperature-dependent resistor, and which is connected to the constant supply voltage, and a first diode and a second diode, wherein the temperature dependent resistor is thermally coupled to the LED arrangement, a voltage proportional to the voltage at the centre terminal of the second voltage divider (R3/R4) is supplied via the first diode to the centre terminal of the first voltage divider (R1/R2), a voltage proportional to the voltage at the centre terminal of the third voltage divider (R5/R6) is further supplied via the second diode to the centre terminal of the first voltage divider (R1/R2), and the voltage at the centre terminal of the first voltage divider (R1/R2) is supplied to the power supply as a reference voltage (U ref). a first voltage divider (R1/R2), consisting of two ohmic resistors (R1, R2), which is connected to a constant supply voltage (U V), and a second voltage divider (R3/R4), consisting of two ohmic resistors (R3, R4), which is connected to the input voltage (U B) of the power supply, characterised in that, the circuit arrangement also has: a third voltage divider (R5/R6), which consists of an ohmic resistor and a temperature-dependent resistor, and which is connected to the constant supply voltage, and a first diode and a second diode, wherein the temperature dependent resistor is thermally coupled to the LED arrangement, a voltage proportional to the voltage at the centre terminal of the second voltage divider (R3/R4) is supplied via the first diode to the centre terminal of the first voltage divider (R1/R2), a voltage proportional to the voltage at the centre terminal of the third voltage divider (R5/R6) is further supplied via the second diode to the centre terminal of the first voltage divider (R1/R2), and the voltage at the centre terminal of the first voltage divider (R1/R2) is supplied to the power supply as a reference voltage (U ref). a third voltage divider (R5/R6), which consists of an ohmic resistor and a temperature-dependent resistor, and which is connected to the constant supply voltage, and a first diode and a second diode, wherein the temperature dependent resistor is thermally coupled to the LED arrangement, a voltage proportional to the voltage at the centre terminal of the second voltage divider (R3/R4) is supplied via the first diode to the centre terminal of the first voltage divider (R1/R2), a voltage proportional to the voltage at the centre terminal of the third voltage divider (R5/R6) is further supplied via the second diode to the centre terminal of the first voltage divider (R1/R2), and the voltage at the centre terminal of the first voltage divider (R1/R2) is supplied to the power supply as a reference voltage (U ref).