A lighting system having a lamp room and a light-emitting direction, comprising: a light source including a laser light-emitting device and a wavelength converting material, the light source being located in the lamp room of the lighting system, the wavelength converting material formed in a planar shape having a light-emitting surface, the wavelength converting material facing the laser light-emitting device in an opposite direction of the light-emitting surface of the wavelength converting material, the light-emitting surface of the wavelength converting material emitting a laser beam having a different light-emitting wavelength from a light-emitting wavelength of a laser beam emitted from the laser light-emitting device, after the laser beam emitted from the laser light-emitting device passes though the wavelength converting material; a reflector located in the lamp room and configured to reflect the laser beam emitted from the light-emitting surface of the wavelength converting material in the light-emitting direction of the lighting system; a circuit board located adjacent the reflector in the lamp room, and located on an opposite side of the light source with respect to the reflector; an acceleration sensor mounted on the circuit board, the acceleration sensor being located in the light-emitting direction of the lighting system with reference to the light source, the acceleration sensor detecting a shock as an acceleration rate, and outputting the acceleration rate as an acceleration signal; a controller receiving the acceleration signal as an input from the acceleration sensor, and comparing the acceleration signal with a threshold; and an integrating circuit connected between the acceleration sensor and a control circuit of the controller to remove noises included in the acceleration signal; wherein the controller is configured to turn off the laser light-emitting device of the light source when the threshold is less than a value of the acceleration signal, wherein the acceleration sensor and the controller are connected via a communication line, and the acceleration sensor outputs the acceleration signal in accordance with a request signal output from the controller, and wherein the controller is configured to turn off the laser light-emitting device when the controller does not receive the acceleration signal from the acceleration sensor in accordance with the request signal output from the controller. a light source including a laser light-emitting device and a wavelength converting material, the light source being located in the lamp room of the lighting system, the wavelength converting material formed in a planar shape having a light-emitting surface, the wavelength converting material facing the laser light-emitting device in an opposite direction of the light-emitting surface of the wavelength converting material, the light-emitting surface of the wavelength converting material emitting a laser beam having a different light-emitting wavelength from a light-emitting wavelength of a laser beam emitted from the laser light-emitting device, after the laser beam emitted from the laser light-emitting device passes though the wavelength converting material; a reflector located in the lamp room and configured to reflect the laser beam emitted from the light-emitting surface of the wavelength converting material in the light-emitting direction of the lighting system; a circuit board located adjacent the reflector in the lamp room, and located on an opposite side of the light source with respect to the reflector; an acceleration sensor mounted on the circuit board, the acceleration sensor being located in the light-emitting direction of the lighting system with reference to the light source, the acceleration sensor detecting a shock as an acceleration rate, and outputting the acceleration rate as an acceleration signal; a controller receiving the acceleration signal as an input from the acceleration sensor, and comparing the acceleration signal with a threshold; and an integrating circuit connected between the acceleration sensor and a control circuit of the controller to remove noises included in the acceleration signal; wherein the controller is configured to turn off the laser light-emitting device of the light source when the threshold is less than a value of the acceleration signal, wherein the acceleration sensor and the controller are connected via a communication line, and the acceleration sensor outputs the acceleration signal in accordance with a request signal output from the controller, and wherein the controller is configured to turn off the laser light-emitting device when the controller does not receive the acceleration signal from the acceleration sensor in accordance with the request signal output from the controller.