A control apparatus to color tune a multi-colored LED array , the apparatus comprising: - a wireless module configured to receive a wireless signal from a wireless control-device , the received wireless signal comprising at least a correlated color temperature value and a distance value of a temperature of the multi-colored LED array from a black-body line; - a control unit coupled to the wireless module and configured to translate signals received from the wireless module , the control unit further coupled to the multi-colored LED array and to an LED driver , the control unit configured to receive power for the multi-colored LED array from the LED driver , the control unit further configured to provide the power to the multi-colored LED array in a manner based on the translated signals; and - a dimmer emulator coupled to the control unit and configured to provide one or more control signals to the LED driver as controlled by the control unit and dependent on the translated signals; characterized in that the dimmer emulator comprises: a current source ; an adjustable-voltage reference coupled to the current source ; a transistor coupled to the adjustable-voltage reference ; and a resistive voltage-divider (R1, R2, R3) configured to have a variable voltage-divider ratio; wherein the resistive voltage-divider includes a first resistor (R1) coupled in series to a first end of a second resistor (R2) and a first end of a third resistor (R3), each of the second resistor (R2) and the third resistor (R3) being coupled on their respective second ends to opposite sides of the transistor , further comprising a signal line coupled to a gate of the transistor , wherein an operation of the transistor is controlled by applying a pulse-width modulation signal to the signal line and wherein the variable voltage-divider ratio is determined by a duty cycle of the applied pulse-width modulation signal. - a wireless module configured to receive a wireless signal from a wireless control-device , the received wireless signal comprising at least a correlated color temperature value and a distance value of a temperature of the multi-colored LED array from a black-body line; - a control unit coupled to the wireless module and configured to translate signals received from the wireless module , the control unit further coupled to the multi-colored LED array and to an LED driver , the control unit configured to receive power for the multi-colored LED array from the LED driver , the control unit further configured to provide the power to the multi-colored LED array in a manner based on the translated signals; and - a dimmer emulator coupled to the control unit and configured to provide one or more control signals to the LED driver as controlled by the control unit and dependent on the translated signals; a current source ; an adjustable-voltage reference coupled to the current source ; a transistor coupled to the adjustable-voltage reference ; and a resistive voltage-divider (R1, R2, R3) configured to have a variable voltage-divider ratio; wherein the resistive voltage-divider includes a first resistor (R1) coupled in series to a first end of a second resistor (R2) and a first end of a third resistor (R3), each of the second resistor (R2) and the third resistor (R3) being coupled on their respective second ends to opposite sides of the transistor , further comprising a signal line coupled to a gate of the transistor , wherein an operation of the transistor is controlled by applying a pulse-width modulation signal to the signal line and wherein the variable voltage-divider ratio is determined by a duty cycle of the applied pulse-width modulation signal. <EOS>