A headlight for a motor vehicle includes a clear, front cover plate, at least one light source, and at least one reflector associated with the light source. The compositions and methods are safe for use on a wide range of fabric articles, even in the home. The distal aperture has a maximum cross-sectional dimension that is less than about one half of a cutoff wavelength, thereby forming a waveguide for attenuating EMI signals that have a wavelength greater than a predetermined cutoff wavelength. The display size of the icons is selected from a finite set of sizes which correspond to a finite set of distance ranges based on the distance to the traffic targets.