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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 for the
definitions of different types of lights and their intended use. |
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| Fog/Foul Weather Lights |
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 |
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Driving
Lights |
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.) |
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