Lighting circuit for automotive lamp

A lighting circuit for an automotive lamp, wherein the automotive lamp comprises a first semiconductor light source and a second semiconductor light source having different colors and is structured to mix the two colors so as to generate mixed-color light, the lighting circuit comprising:

• a first driving circuit structured to supply a first driving current stabilized to a first target amount to the first semiconductor light source;
• a second driving circuit structured to supply a second driving current stabilized to a second target amount to the second semiconductor light source;
• a first abnormal state detection circuit structured to stop an operation of the second driving circuit in responsive to detecting an abnormal non-lighting state in the first semiconductor light source;
• and
• a second abnormal state detection circuit structured to stop an operation of the first driving circuit in responsive to detecting an abnormal non-lighting state in the second semiconductor light source.