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Proper auxiliary lamp aiming is the most important part of an installation. If the lamps are not properly aimed they will not achieve optimum performance and they can be very dangerous. The danger comes from the beam pattern being aimed right into oncoming vehicles thus blinding the driver. Check the Lamp Selection Guide on page 4 for the definitions of different types of lights and their intended use. |
FOG/FOUL
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Traditional fog lights are usually mounted under the
front bumper about 10-24 inches from the ground. There are two important
issues to address when installing fog lights, the first is to minimize the
amount of return glare into the driver's eyes, and the other is to minimize
glare into oncoming driver's eyes. Both must be accomplished while putting
as much light as possible on the road.
These fog/foul weather light aiming instructions are suggestions taken from common practice and the S.A.E. standard J583. Some modifications to these instructions may be necessary to minimize glare. Visual aim is made with the top of the beam 4 inches below the lamp center at 25 feet with the lamp facing straight forward. (See below.) |
DRIVING
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Typically, driving lights are mounted above the front
bumper about 14-30 inches from the ground to provide extra high beam
illumination. Driving lights can be mounted below the bumper, although
they will not be as effective because the light will hit the ground sooner
and reduce the range of the light.
Visual aim is made with the center of the beam hot spot 1.5 inches below the lamp center at 25 feet with the lamp facing straight forward. (See below.) |
