High Performance Fog Lamps: Design Strategies and Proper Usage

The use of Free-Form Reflector (FFR) technology allows the enhancement of performance in fog lamp design, especially where the figure of merit for performance is the sharpness of the cutoff line. However, traditional fog lamp bulbs with transverse filament orientations may not be the most desirable light source to take advantage of FFR technology. Axial filament orientations can have advantages over transverse filament orientations in the design of FFR fog lamps. Also, as front fog lamps have increasingly higher photometric performance levels, they exhibit an increased sensitivity to lamp misaiming and other detrimental lighting conditions. This paper will discuss high performance fog lamp design strategies using FFR technology and proper usage of front fog lamps.