Abstract: A daytime headlight illumination device carried by a motor vehicle such as a motorcycle or a car for better visibility thereof to other motor vehicles comprising a motor vehicle headlight assembly including a light source and a headlight lens and a shutter assembly located directly in front of the headlight lens and in the path of light rays originating from the light source, the shutter assembly including a plurality of fluorescently colored movable shutter blades and means for moving the shutter blades between an open position for use during nighttime wherein the light rays are passing through only the headlight lens and a closed position for use during daytime wherein the light rays are passing through the headlight lens and the fluorescently colored shutter blades so as to make the motor vehicle carrying the device highly visible during the daytime.