An Auxiliary Light has something to do with any device serving as a source of illumination. In automobile industry, various auxiliary, supporting or supplementary lights are used as an illuminating device, to wit:
1. Driving lights - are auxiliary lights that extend the reach of standard headlights, as they have narrower beam than headlights;
2. Foglights - are auxiliary lights that provide a wider beam pattern than standard headlights. Foglights are usually mounted lower than headlights to illuminate below fog and reduce reflected glare. Used in when driving into foggy places or weather;
3. Halogen - lights that provide brighter and longer lasting illumination than standard incandescent lights. Halogen bulbs are filled with a gas such as iodine, that reduces the gradual evaporation of the tungsten filament and increases its life; and