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.