Chevy TrailBlazer Crystal Fog Lights Kit

Front fog lamps provide a wide, bar-shaped beam of light with a sharp cutoff at the top, and are generally aimed and mounted low. They are intended for use at low speed to increase the illumination directed towards the road surface and verges in conditions of poor visibility due to rain, fog, dust or snow. As such, they are often most effectively used in place of dipped-beam headlamps, reducing the glare back from fog or falling snow, although the legality varies by jurisdiction of using front fog lamps without low beam headlamps.