An automotive light comprising: a substantially basin-shaped rear body; a front half-shell which is arranged to close the mouth of the rear body and is provided with at least a transparent or semitransparent sector; at least a first lighting assembly that emits light on command and is located inside the rear body in order to backlight said transparent or semitransparent sector of the front half-shell; the first lighting assembly comprising: a reflector body which is located inside the rear body and is internally provided with a reflecting surface shaped so as to reflect the incident light towards said transparent or semitransparent sector of the front half-shell; at least one row of LEDs that are arranged inside the rear body close to the reflector body, and are oriented so as to direct a prevailing/major part of the light produced directly towards the reflecting surface of said reflector body; and at least one light-guide plate made of photoconductive material, which is arranged inside the rear body, beside the reflector body, with its rear sidewall on a side of the row of LEDs so as to be illuminated by a minor part of the light emitted by said LEDs the automotive light being characterized in that the rear sidewall of the light-guide plate has a serrated profile that includes a series of small protruding teeth adapted to distribute the light inside the light-guide plate, wherein the LEDs of the first lighting assembly are distributed beside the rear sidewall of the light-guide plate so that each LED can illuminate a plurality of said protruding teeth, and wherein each protruding tooth has a substantially polyhedral wedge-shaped structure that is adapted to refract and then reflect at least a part of the light rays (r) entering into the protruding tooth, while the same light rays (r) are still inside the body of the tooth. the first lighting assembly comprising: a reflector body which is located inside the rear body and is internally provided with a reflecting surface shaped so as to reflect the incident light towards said transparent or semitransparent sector of the front half-shell; at least one row of LEDs that are arranged inside the rear body close to the reflector body, and are oriented so as to direct a prevailing/major part of the light produced directly towards the reflecting surface of said reflector body; and at least one light-guide plate made of photoconductive material, which is arranged inside the rear body, beside the reflector body, with its rear sidewall on a side of the row of LEDs so as to be illuminated by a minor part of the light emitted by said LEDs the automotive light being characterized in that the rear sidewall of the light-guide plate has a serrated profile that includes a series of small protruding teeth adapted to distribute the light inside the light-guide plate, wherein the LEDs of the first lighting assembly are distributed beside the rear sidewall of the light-guide plate so that each LED can illuminate a plurality of said protruding teeth, and wherein each protruding tooth has a substantially polyhedral wedge-shaped structure that is adapted to refract and then reflect at least a part of the light rays (r) entering into the protruding tooth, while the same light rays (r) are still inside the body of the tooth.