A lighting apparatus, comprising: a first light source of a light source set; a second light source of the light source set; a current controller ; a current source controlled by the current controller for generating a first driving current to the first light source and for generating a second driving current to the second light source ; and a signal converter for converting a first type control signal to a second type control signal , wherein the first type control signal indicates a light parameter to be produced by the light source set and the second light source , wherein the signal converter is capable of receiving multiple formats of first type control signal , wherein one of the multiple formats is a first Pulse Width, PWM, Modulation signal, characterized in that the second type control signal comprises a clock signal and a data signal supplied to the current controller to determine the first driving current and the second driving current , wherein the data signal indicates a first digital value corresponding to the first driving current and indicates a second digital value corresponding to the second driving current , wherein the current source has a first Digital to Analog Converter, DAC, receiving the first digital value to generate the first driving current , wherein the current source has a second DAC receiving the second digital value to generate the second driving current , wherein the first type control signal further comprises a second PWM signal, wherein the first PWM signal corresponds to the first driving current and the second PWM signal corresponds to the second driving current . a first light source of a light source set; a second light source of the light source set; a current controller ; a current source controlled by the current controller for generating a first driving current to the first light source and for generating a second driving current to the second light source ; and a signal converter for converting a first type control signal to a second type control signal , wherein the first type control signal indicates a light parameter to be produced by the light source set and the second light source , wherein the signal converter is capable of receiving multiple formats of first type control signal , wherein one of the multiple formats is a first Pulse Width, PWM, Modulation signal, characterized in that the second type control signal comprises a clock signal and a data signal supplied to the current controller to determine the first driving current and the second driving current , wherein the data signal indicates a first digital value corresponding to the first driving current and indicates a second digital value corresponding to the second driving current , wherein the current source has a first Digital to Analog Converter, DAC, receiving the first digital value to generate the first driving current , wherein the current source has a second DAC receiving the second digital value to generate the second driving current , wherein the first type control signal further comprises a second PWM signal, wherein the first PWM signal corresponds to the first driving current and the second PWM signal corresponds to the second driving current . <EOS>