Automotive light comprising: a substantially basin-shaped rear casing ; a front half-shell which is arranged to close the mouth of the rear casing ; and at least one lighting assembly that emits light on command, and is located inside the rear casing so as to be able to selectively backlight a corresponding transparent or semitransparent sector of the front half-shell ; the lighting assembly comprising: a light-guide bar that is made of photoconductive material and is adapted to channel the light by total internal reflection; and at least one electrically-powered light source which is located inside the rear casing , close to a proximal end of the light-guide bar , and is adapted to selectively direct, towards the same proximal end , a light beam that enters into the body of the light-guide bar ; said light source comprising: a supporting board located inside the rear casing adjacent to the proximal end of the light-guide bar ; and one or more LEDs placed on a face of the supporting board within a given active area , so as to face the proximal end of the light-guide bar ; the automotive light being characterised in that the light source additionally comprises an oblique guiding slide which is slanted towards the active area of said supporting board , ends substantially at the perimeter border of said active area , and is adapted to slide the proximal end of the light-guide bar towards the active area of the supporting board ; and in that the proximal end of the light-guide bar is provided with a platelike head that extends to cover the active area of the supporting board , with its lower face locally skimmed over the LED(s) , and with a spacer protrusion or shoulder which juts out beyond the lower face of the platelike head , and is adapted to abut against the supporting board so as to keep the lower face of the platelike head at a given distance from the underlying LED or LEDs ; said spacer protrusion or shoulder being adapted to rest in free sliding manner onto said oblique guiding slide during the coupling of the proximal end of the light-guide bar with said light source . the lighting assembly comprising: a light-guide bar that is made of photoconductive material and is adapted to channel the light by total internal reflection; and at least one electrically-powered light source which is located inside the rear casing , close to a proximal end of the light-guide bar , and is adapted to selectively direct, towards the same proximal end , a light beam that enters into the body of the light-guide bar ; said light source comprising: a supporting board located inside the rear casing adjacent to the proximal end of the light-guide bar ; and one or more LEDs placed on a face of the supporting board within a given active area , so as to face the proximal end of the light-guide bar ; the automotive light being characterised in that the light source additionally comprises an oblique guiding slide which is slanted towards the active area of said supporting board , ends substantially at the perimeter border of said active area , and is adapted to slide the proximal end of the light-guide bar towards the active area of the supporting board ; and in that the proximal end of the light-guide bar is provided with a platelike head that extends to cover the active area of the supporting board , with its lower face locally skimmed over the LED(s) , and with a spacer protrusion or shoulder which juts out beyond the lower face of the platelike head , and is adapted to abut against the supporting board so as to keep the lower face of the platelike head at a given distance from the underlying LED or LEDs ; said spacer protrusion or shoulder being adapted to rest in free sliding manner onto said oblique guiding slide during the coupling of the proximal end of the light-guide bar with said light source . <EOS>