A lamp for a vehicle comprising: at least one laser diode configured to output light; at least one controller configured to: receive a signal comprising brake operation information, and based on the signal comprising brake operation information, generate a signal to control on/off or a light intensity of the at least one laser diode wherein the at least one controller is further configured to: when a signal indicating that a braking operation is performed with a preset value of force or more is received, generate a signal to control the at least one laser diode to reduce the light intensity, wherein the at least one controller is further configured to: receive a signal comprising object information, and generate a signal to control on/off or the light intensity of the at least one laser diode based on the signal comprising object information, characterized in, that the object information includes information on whether an object is a living object, and wherein the at least one controller is further configured to: based on the signal comprising information whether an object is a living object, generate a signal to control on/off or the light intensity of the at least one laser diode, wherein when the object is a living thing, the controller controls the laser diode so as to be dimmed in response to a braking operation performed with a preset value or more of force, and wherein when the object is not a living thing, the controller keeps the laser diode in an ON-state, rather than being dimmed, even if a braking operation is performed with a preset value or more of force. at least one laser diode configured to output light; at least one controller configured to: receive a signal comprising brake operation information, and based on the signal comprising brake operation information, generate a signal to control on/off or a light intensity of the at least one laser diode wherein the at least one controller is further configured to: when a signal indicating that a braking operation is performed with a preset value of force or more is received, generate a signal to control the at least one laser diode to reduce the light intensity, wherein the at least one controller is further configured to: receive a signal comprising object information, and receive a signal comprising brake operation information, and based on the signal comprising brake operation information, generate a signal to control on/off or a light intensity of the at least one laser diode wherein the at least one controller is further configured to: when a signal indicating that a braking operation is performed with a preset value of force or more is received, generate a signal to control the at least one laser diode to reduce the light intensity, wherein the at least one controller is further configured to: receive a signal comprising object information, and generate a signal to control on/off or the light intensity of the at least one laser diode based on the signal comprising object information, characterized in, that the object information includes information on whether an object is a living object, and wherein the at least one controller is further configured to: based on the signal comprising information whether an object is a living object, generate a signal to control on/off or the light intensity of the at least one laser diode, wherein when the object is a living thing, the controller controls the laser diode so as to be dimmed in response to a braking operation performed with a preset value or more of force, and wherein when the object is not a living thing, the controller keeps the laser diode in an ON-state, rather than being dimmed, even if a braking operation is performed with a preset value or more of force.