Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
Devices used to eliminate headlamp glare which causes danger to oncoming traffic. Two main features are incorporated: 1. The beam direction is changed by directing the current through the upper, dip, filament. This reflected light is refracted (bent) by the prisms of the lens, the upper beams being directed down, and the lower beams deflected up. 2. Fluted portions of the lens direct more of the light to the near side of the road.