My 2015 GMC 2500HD has projection headlights and create a huge blind spot on either side of the vehicle.
I replaced the stock fog light bulbs with high output LED bulbs and used reflective tape on the inside face of the black bezel. This reflects a lot of light to the sides.
I also removed the grill, mounted an 18" wide LED light bar then re-installed the grill. I added a relay between the light bar and the battery terminal and used the fog lamp hot lead as the relay on/off. I pointed the light slightly down so the beams mirrored the low beam light pattern.
On those dark nights when you're away from the city lights, it makes all the difference in the world.