The present invention relates to an illumination device for vehicles with at least light-emitting
diode (3) and a
light control unit (1), wherein the
light control unit (1) is connected to the at least one light-emitting
diode (3) and a pulse-width modulated
clock signal (PWM) can be generated and transmitted to the at least one light-emitting
diode (3) with the
light control unit (1). The illumination device for vehicles according to the invention comprises a circuit (2) arranged between the light
control unit (1) and the at least one light-emitting diode (3), with which, depending on the
control signal (S), the pulse-width modulated
clock signal (PWM) can be fed via different resistors (R1, R2, R3) to the at least one light-emitting diode (3). The present invention further relates to a method for controlling an illumination device for vehicles with at least one light-emitting diode (3) and a light
control unit (1). In the method according to the invention the light
control unit (1) generates a pulse-width modulated
clock signal (PWM), which the light control unit (1) transmits to a circuit (2). The circuit receives a
control signal (S) and, depending on the
control signal (S), feeds the pulse-width modulated
clock signal to the at least one light-emitting diode (3) via different resistors (R1, R2, R3).