Notice that they said "Off road only"! Some states require fog lights to be wired to operate with low beam headlights only. Due to the way they are focused and project light, I can't think of any situation where you would want to operate only fog lights and nothing else. They are designed to compliment low beams by shining low, close and wide.
Also, you really should run their power through a relay. If you put them through the parking lights they will always be on with ANY lights. If they are high power bulbs I doubt if those parking light wires will supply enough current, unless you use them to just operate the relay (with an independant switch).
Beer is the answer - it doesn't matter what the question is!
'86 CJ7, 265 CI, DUI, TF999, Borla, Weber, 4" BDS Lift.
'04 AEV RUBICON.
'00 TJ Sahara.