Can you say more about what conditions warrant the use of auxilliary lights?
Fog lights, by by DOT regulation, are supposed to be wired to the low
beams so that they can only come on when the low beams are on. They're
useful in fog, rain and snow. I have occasionally used them on very
twisty and lightly travelled back roads where they help to illuminate
the road edges. Otherwise, they should not be used in clear conditions,
since they serve no purpose.
Not many cars have auxilliary driving lights, which are essentially
"super-high-beams" that provide improved long distance visibility. By
DOT regulation, they have to be wired to the high beams. As with high
beams, they should only be used in open areas under clear conditions,
when there is no oncoming traffic. The improved performance of modern
high-beam headlights have made driving lights essentially superfluous
other than for off-road use.
It seems like folks with four-light setups drive with them all on as a
matter of course.
Why? What possible purpose could it serve under clear conditions on
typical roads? All it does is blind and/or annoy other drivers without
providing any benefit to any one. It's pointless.
Also, why do you consider the extra lights a major eye
irritant, assuming of course that they are placed below the regular
headlights and properly aimed?
Do you actually drive a car? If so, the answer should be obvious.
Unnecessary use of fog lights is irritating to other drivers and it's
just plain inconsiderate. Although proper aiming helps, bright lights
are still bright lights.