It was very easy to mount my Light Force 170 Striker 170 running lights. The Rancher grille guard has six 1/2 inch mounting holes, since I have an '07 F-150, I used the four bottom holes for mounting the guard leaving the top two holes exposed. You can see this in the following image...
These two holes allowed me to place the lights right where I wanted without any drilling.
It works for me...