VEHICLE IN-CABIN LIGHTING SYSTEM, METHOD FOR ACTUATING VEHICLE IN-CABIN LIGHTING SYSTEM, AND STORAGE MEDIUM

A vehicle in-cabin lighting system includes: an outward gaze guiding section that is provided inside a vehicle cabin at a vehicle front side and at a vehicle width direction outer side of a vehicle seat, and that becomes brighter than its surroundings on activation of an outer side lighting device; and a control section that is configured to determine whether or not an occupant sifting on the vehicle seat has an interest in interacting with another occupant inside the vehicle cabin based on detection of operation of an operation section by the occupant or based on detection of a state of the occupant, and to activate the outer side lighting device so as to make the outward gaze guiding section brighter in a case in which determination is made that there is no interest in interacting.