Fog Light/Daytime Running Lights - XV1900 Big Bike Parts? analyzed the OEM assemblies and dramatically increased the brightness with the use of better LED*s and reflectors, They have added a day time running light within the fog light assembly through a splice to the key switch circuit, so when the fogs are turned off the day time running lights are still on, Utilizing the onboard OEM switch and switch wire harness makes the fog light portion a plug-n-play with the included relay to complete the install process, These fog lights are both DOT and E-mark and deliver 6000K light