I have a set of 100W and a set of 55w on the front of each of my rigs and also a set of 55w'ers on the back of each. I treat the lights on the front as "hi beam" and use them all the time when driving. When ever a car is approaching though, I turn them off , again just like your normal hi-beams. I will leave the 55's on if the on coming traffic also has their "fog lights" on . I have ran this way for years an have never had a problem with LE, even when they saw them on/ then off when they were the on coming traffic.
For the extra sets on the back, I wire a separate switch in for them so that they can be turned on at any time ( so separate from your normal shift actuated reverse lights) By doing this, you can check on a trailer while running down the road, and they make a nice tailgaiter deterant too

. I mount these on top of the bumper on the outside corners so they clear the tailgate or lift gate depending on the rig. If you install them under the bumper, don't drive through any ditches....

Northern Tool has the round 100 w pictured for around $12 each with the stone gurard. included.