An automotive light comprising: a rear body adapted to be fixed to the vehicle; a front half-shell arranged to close the mouth of said rear body; and at least one lighting assembly that is located inside the rear body and is adapted to backlight a corresponding transparent or semi-transparent sector of the front half-shell; said lighting assembly comprising: at least one light-guide plate (10, 110) of suitable thickness, which is made of photoconductive material; and a set of electrically -powered light sources that are located close to a first side of the light-guide plate (10, 110) and direct the light produced into the body of the same light-guide plate (10, 110) via a facing first lateral sidewall (12, 112) of the same plate so that said light propagates within the body of the light-guide plate (10, 110) by total internal reflection; wherein said light-guide plate (10, 110) is located inside the rear body with a first face facing the front half-shell and a second face facing the bottom of the rear body; wherein said light-guide plate (10, 110) has a perimeter light-exit band (13, 113) extending along the perimeter of the first face of the light-guide plate (10, 110), for at least two consecutive sides of the same light-guide plate (10, 110), and is structured so as to cause the light to come out of the same light-guide plate (10, 110); wherein the first lateral sidewall (12, 112) of said light-guide plate (10, 110) is opposite to a first segment of said perimeter light-exit band (13, 113); said automotive light being characterized in that said light-guide plate (10, 110) also has, on its first or second face, a light-distributing recess (14, 114) of given shape, which has a depth less than the local thickness (s) of the light-guide plate (10, 110), is interposed between said first lateral sidewall (12, 112) and said first segment of the perimeter light-exit band (13, 113), and is shaped so as to distribute part of the light coming from the first lateral sidewall (12, 112) of the light-guide plate (10, 110) substantially along the whole length of said perimeter light-exit band (13, 113). said lighting assembly comprising: at least one light-guide plate (10, 110) of suitable thickness, which is made of photoconductive material; and a set of electrically -powered light sources that are located close to a first side of the light-guide plate (10, 110) and direct the light produced into the body of the same light-guide plate (10, 110) via a facing first lateral sidewall (12, 112) of the same plate so that said light propagates within the body of the light-guide plate (10, 110) by total internal reflection; wherein said light-guide plate (10, 110) is located inside the rear body with a first face facing the front half-shell and a second face facing the bottom of the rear body; wherein said light-guide plate (10, 110) has a perimeter light-exit band (13, 113) extending along the perimeter of the first face of the light-guide plate (10, 110), for at least two consecutive sides of the same light-guide plate (10, 110), and is structured so as to cause the light to come out of the same light-guide plate (10, 110); wherein the first lateral sidewall (12, 112) of said light-guide plate (10, 110) is opposite to a first segment of said perimeter light-exit band (13, 113); said automotive light being characterized in that said light-guide plate (10, 110) also has, on its first or second face, a light-distributing recess (14, 114) of given shape, which has a depth less than the local thickness (s) of the light-guide plate (10, 110), is interposed between said first lateral sidewall (12, 112) and said first segment of the perimeter light-exit band (13, 113), and is shaped so as to distribute part of the light coming from the first lateral sidewall (12, 112) of the light-guide plate (10, 110) substantially along the whole length of said perimeter light-exit band (13, 113).