Usage of neon underglow lighting is governed by Washington Administrative Code, Title 204: State Patrol (Equipment), Chapter 21: Lighting Requirements, Section 230: Lighting Equipment Prohibited.
Is neon underglow legal in Washington D.C.?
Washington law restricts additional aftermarket vehicle lighting which includes neon underglow. In Washington D.C. neon underglow is illegal.
Using car underglow is legal when parked on a private property, however to make sure you’re completely within the law ensure your lights are not displaying red or blue colors, nor flashing or rotating in any way.
Any aftermarket lights installed must also not cover existing required vehicle lights (ex. avoid placing neon lights over license plate illumination etc.).
Washington D.C. vehicle lighting laws
Below are all relevant excerpts from Washington Vehicle Code that limit, restrict or allow certain aftermarket lights to be installed on vehicles.
WAC 204-21-230 – Lighting equipment prohibited.
[...] (a) If a vehicle is in motion on a public roadway, the vehicle must not:
(i) Display aftermarket neon lighting devices. [...]
(b) If a vehicle is not in motion and parked on private property, the vehicle may use aftermarket lighting except as outlined under RCW 46.37.180. [...]
(2) Pursuant to Title 49 C.F.R. Part 571.108, the addition of an aftermarket style ornament or other feature such as tinted plastic glass covers, a grille or slotted covers must not be placed in front of the headlamp lens, or in front of any other lighting devices installed on motor vehicles which impair the effectiveness of lighting equipment required [...]
(3) Red emergency lights are prohibited on any vehicle other than an authorized emergency vehicle, a law enforcement vehicle, an emergency tow truck as defined in WAC 204-21-020(8), school buses, and private carrier buses.
(4) Blue lights are prohibited on any vehicle other than a law enforcement vehicle as defined in WAC 204-21-020.
(5) Flashing white lights are prohibited on any vehicle other than authorized emergency vehicles, law enforcement vehicles, school buses, and emergency tow trucks as defined in WAC 204-21-020.
Even if only used on private property, you may want to avoid using blue and red colors, and all flashing or rotating underglow.
Penalty for violation of these vehicle lighting regulations in the state of Washington equals a $124 fine.
State of Washington D.C. Info
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States.
Capital: Washington, D.C.
Population: 658,893 (2014)
Area: 68.3 sq miles (176.9 km²)
Cities in Washington D.C.:
Counties in Washington D.C.:
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