If you want to update your factory fog lights to brighter and more energy efficient LED lights, youll need the proper mounting brackets. This pair of LED light mounting brackets from Rugged Ridge has a 3.5 in. circular hole that allows you to mount 3.5- in. round LED lights (15209.01) into the factory or Rugged Ridge bumper systems (XHD and All-Terrain) for the ultimate in nighttime illumination on the trails.