Just thought I would share what I did to my XGT's today to hopefully keep them on my truck
I have the security locknuts that you buy to mount them to the bar but you can still easily remove the vertical adjustment bolt and remove the rest of the light so to counter this I made some threaded ferrules by cutting down some S/S nutserts
And then changed the bolt over to a longer one and locktited the ferrules onto the end so that you can still loosen off the bolt to make adjustments but you cannot remove it without a lot of stuffing around
Hopefully it does the job and I get to keep them