A light source lighting circuit comprising: a first lighting circuit comprising a first light emission driving circuit and configured to receive current from an electric power supply line and to supply drive current to a first light source, and a second lighting circuit comprising a second light emission driving circuit and configured to receive current from the electric power supply line and to supply drive current to a second light source, characterized in that: the first lighting circuit is configured to generate a first state signal (Sal) corresponding to a state of the drive current flowing to the first light source and to output a second notification signal corresponding to the first state signal (Sal) to the second lighting circuit, the second lighting circuit is configured to generate a second state signal corresponding to a state of the drive current flowing to the second light source and to output a first notification signal (Sdl) corresponding to the second state signal to the first lighting circuit, wherein when the first state signal (Sal) indicates a disconnection with the first light source or when the first notification signal (Sdl) indicates a disconnection with the second light source, the first lighting circuit is configured to stop operation thereof, and wherein when the second state signal indicates a disconnection with the second light source or when the second notification signal indicates a disconnection with the first light source, the second lighting circuit is configured to stop operation thereof. a first lighting circuit comprising a first light emission driving circuit and configured to receive current from an electric power supply line and to supply drive current to a first light source, and a second lighting circuit comprising a second light emission driving circuit and configured to receive current from the electric power supply line and to supply drive current to a second light source, characterized in that: the first lighting circuit is configured to generate a first state signal (Sal) corresponding to a state of the drive current flowing to the first light source and to output a second notification signal corresponding to the first state signal (Sal) to the second lighting circuit, the second lighting circuit is configured to generate a second state signal corresponding to a state of the drive current flowing to the second light source and to output a first notification signal (Sdl) corresponding to the second state signal to the first lighting circuit, wherein when the first state signal (Sal) indicates a disconnection with the first light source or when the first notification signal (Sdl) indicates a disconnection with the second light source, the first lighting circuit is configured to stop operation thereof, and wherein when the second state signal indicates a disconnection with the second light source or when the second notification signal indicates a disconnection with the first light source, the second lighting circuit is configured to stop operation thereof. the first lighting circuit is configured to generate a first state signal (Sal) corresponding to a state of the drive current flowing to the first light source and to output a second notification signal corresponding to the first state signal (Sal) to the second lighting circuit, the second lighting circuit is configured to generate a second state signal corresponding to a state of the drive current flowing to the second light source and to output a first notification signal (Sdl) corresponding to the second state signal to the first lighting circuit, wherein when the first state signal (Sal) indicates a disconnection with the first light source or when the first notification signal (Sdl) indicates a disconnection with the second light source, the first lighting circuit is configured to stop operation thereof, and wherein when the second state signal indicates a disconnection with the second light source or when the second notification signal indicates a disconnection with the first light source, the second lighting circuit is configured to stop operation thereof.