Light driver calibration

A method of calibrating illumination generated by a plurality of light sources, the method comprising:

• controlling a power supply to output a first charge voltage to a light string driver coupled to the plurality of light sources;
• storing a first capacitor voltage in a storage capacitor of the light string driver based on the first charge voltage;
• controlling a switch of the light string driver into a conduction state to discharge at least a portion of the first capacitor voltage stored in the storage capacitor through the plurality of light sources, through the switch, and through a sense resistor;
• and
• comparing a reference voltage with a resistor discharge voltage, the resistor discharge voltage generated across the sense resistor in response to the discharge of the at least a portion of the first capacitor voltage.