Beginning Jan. 1, drivers in the state of Tennessee may only have white or amber-colored steady-burning lights on the front of their vehicles. Flashing lights of any color will be illegal.
The law, which comes as an update to Tennessee Code Annotated 55-9-402(d), officially makes most colored headlights illegal across the state.
LED headlights, xenon headlights and super blue halogen headlights can all appear blue, however these bulbs actually emit white light. This means they will remain legal to use, but any bulb that emits real blue light will not.
The only exception to the flashing lights rule for personal vehicles involves factory installed emergency flashers. These must be white or amber.
Steady-burning lights on personal vehicles may only be a color other than white or amber if the vehicle is “equipped with headlamps, daytime running lamps or other similar devices in any color or combination of colors between white and amber authorized by the Federal Motor Vehicle Safety Standard No. 108.”
Exceptions to the updated law exist for emergency vehicles, school buses, mail carriers and official escort vehicles.
Highway maintenance, utility and recovery vehicles are also exempt from the flashing lights portion of the law.