A rear light device for a racing car comprising: an LED light device comprising an LED lighting structure provided with multiple LEDs, and a display device which consists of a mini-LED electronic matrix or a micro-LED electronic matrix, and is arranged in a position adjacent to the LEDs of said LED light device, an electronic control system configured to selectively control: said LED light device to emit, by said LEDs a signal light to signal the presence of said car to the drivers of other racing cars, and/or - said display device to display at least one image, the rear light device comprising: a housing body a lenticular body that is coupled to the housing body an electronic board that is arranged inside said housing body, said mini-LED electronic matrix or said micro-LED electronic matrix being arranged on said electronic board facing said lenticular body wherein the LEDs of said LED lighting structure are arranged on said electronic board in order to externally surround said mini-LED electronic matrix or said micro-LED electronic matrix, characterized in that the LEDs of said LED lighting structure are arranged on a second surface of said electronic board opposite said lenticular body and are optically coupled to light guide plates structured to guide the light of said LEDs towards said lenticular body. an LED light device comprising an LED lighting structure provided with multiple LEDs, and a display device which consists of a mini-LED electronic matrix or a micro-LED electronic matrix, and is arranged in a position adjacent to the LEDs of said LED light device, an electronic control system configured to selectively control: said LED light device to emit, by said LEDs a signal light to signal the presence of said car to the drivers of other racing cars, and/or - said display device to display at least one image, the rear light device comprising: a housing body a lenticular body that is coupled to the housing body an electronic board that is arranged inside said housing body, said mini-LED electronic matrix or said micro-LED electronic matrix being arranged on said electronic board facing said lenticular body wherein the LEDs of said LED lighting structure are arranged on said electronic board in order to externally surround said mini-LED electronic matrix or said micro-LED electronic matrix, characterized in that the LEDs of said LED lighting structure are arranged on a second surface of said electronic board opposite said lenticular body and are optically coupled to light guide plates structured to guide the light of said LEDs towards said lenticular body. - said display device to display at least one image, the rear light device comprising: a housing body a lenticular body that is coupled to the housing body an electronic board that is arranged inside said housing body, said mini-LED electronic matrix or said micro-LED electronic matrix being arranged on said electronic board facing said lenticular body wherein the LEDs of said LED lighting structure are arranged on said electronic board in order to externally surround said mini-LED electronic matrix or said micro-LED electronic matrix, characterized in that the LEDs of said LED lighting structure are arranged on a second surface of said electronic board opposite said lenticular body and are optically coupled to light guide plates structured to guide the light of said LEDs towards said lenticular body. a housing body a lenticular body that is coupled to the housing body an electronic board that is arranged inside said housing body, said mini-LED electronic matrix or said micro-LED electronic matrix being arranged on said electronic board facing said lenticular body wherein the LEDs of said LED lighting structure are arranged on said electronic board in order to externally surround said mini-LED electronic matrix or said micro-LED electronic matrix, characterized in that the LEDs of said LED lighting structure are arranged on a second surface of said electronic board opposite said lenticular body and are optically coupled to light guide plates structured to guide the light of said LEDs towards said lenticular body.