Gonna have to say that lighting is a 12mo/12 K item anyway. along with finishes, bright chrome, trim, paint, battery brakes and a ton of other stuff.
or at least it used to be that way. I pissed off the dealer when they wouldn't warranty them at 20K and less than 2 years. I asked them if those items were between the bumpers and they said yes, and then got pissed when I said they should cover it, lol.