Wyoming Neon Underglow Laws

Wyoming neon underglow usage is governed by the state's Code. All relevant laws, rules and regulations pertaining to vehicle lighting including car underglow in Wyoming have been provided below. Make sure to examine the regulations carefully and do not use any restricted lights.

Usage of neon underglow lighting is governed by Wyoming Statutes, Title 31: Motor Vehicles, Chapter 5: Regulation of Traffic on Highways, Article 9: Equipment, Division 2: Lights; Safety Equipment.

Is neon underglow legal in Wyoming?

Wyoming law does not restrict additional aftermarket vehicle lighting which would include neon underglow. Therefore it’s our conclusion that in Wyoming neon underglow is not illegal, as long as you follow these restrictions:

  • all lights visible from the back of the car should be red
  • red or blue lights may not be visible from the front of the car
  • license plate illumination must be white
  • no flashing lights are permitted

To be safe we recommend completely avoiding red and blue colors, and any combination of red, blue, amber and white lights which may imitate an emergency vehicle.

There are no relevant WY laws which restrict or prohibit installing car underbody lighting, thus we consider it legal to use while driving.

Wyoming vehicle lighting laws

Below are all relevant excerpts from Wyoming Vehicle Code that limit, restrict or allow certain aftermarket lights to be installed on vehicles.

31-5-901.  General requirements; applicability of provisions.

[…] (b)  Nothing contained in this act shall prohibit equipment required by the United States Department of Transportation nor the use of additional parts and accessories on any vehicle not inconsistent with the provisions of this act. […]

This provision is important to note as it essentially permits using underglow as long as it’s not in violation of other laws and regulations.

§ 31-5-917.  Color of lighting devices.

All lighting devices and reflectors mounted on the rear of any vehicle shall display or reflect a red color, except the stop light or other signal device, which may be red or yellow, and except that the light illuminating the license plate shall be white and the light emitted by a backup lamp shall be white.

§ 31-5-928.  General lighting restrictions; authorized emergency vehicles.

[…] (b) Except as required in W.S. 31-5-929 and this section, no person shall drive or move any vehicle or equipment upon any highway with any lamp or device thereon capable of displaying a red light or blue light visible from directly in front of the center thereof.

(c) Flashing lights are prohibited except as authorized […]

(d) Every authorized emergency vehicle, except police vehicles and as otherwise specified in this subsection, shall, in addition to any other equipment required by law, be equipped with at least one (1) red lamp visible from five hundred (500) feet in front of the vehicle. Except as otherwise provided in this subsection, every authorized emergency vehicle, may be equipped with one (1) or more blue, white or amber lights. Vehicles used by the department to clear snow from public highways may be equipped with one (1) or more lights of a conspicuous color as specified by rules adopted by the department. Privately-owned vehicles used by members of a fire department or emergency service organization in performing or traveling to perform assigned duties in those organizations shall display at least one (1) flashing white, red or amber light, but no blue lights, visible from five hundred (500) feet in front of the vehicle.


As per Article 31-5-901, violating vehicle equipment regulations is considered a misdemeanor.

31-5-901.  General requirements; applicability of provisions.

(a)  It is a misdemeanor for any person to drive or move or for the owner to cause or knowingly permit to be driven or moved on any highway any vehicle or combination of vehicles which is in such unsafe condition as to endanger any person, or which does not contain those parts or is not at all times equipped with such lamps and other equipment in proper condition and adjustment as required in this act, or which is equipped in any manner in violation of this act, or for any person to do any act forbidden or fail to perform any act required under this act.

Violation of vehicle lighting equipment laws in Wyoming is considered a misdemeanor.

Our information about car neon underglow laws in Wyoming was last updated in 2023 and checked in 2024. In case any info we provided is not up to date or correct be sure to contact us so we can revise it. Thank you!

Check our data with your local law enforcement or other relevant agencies! Wyoming underglow laws in certain cities or counties may be different from state legislation. While we do our very best to provide the most accurate information about LED and neon street glow usage we will not be held liable for any potentially incorrect or misinterpreted info.

State of Wyoming Info

Wyoming is a state in the mountain region of the Western United States: 10th most extensive, but the least populous and the second least densely populated of the 50 United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High Plains. Cheyenne is the capital and the most populous city of Wyoming with a population of nearly 60,000 people within its city proper.

Capital: Cheyenne

Population: 576,412

Area: 97,814 sq mi (253,348 km2)

Cities ▼

Cities in Wyoming: Cheyenne, Casper, Laramie, Jackson, Cody, Gillette, Rock Springs, Sheridan, Lander, Riverton, Thermopolis, Rawlins, Pinedale, Evanston, Green River, Pavillion, Buffalo, Buford, Worland, Douglas, Spearfish, Sundance, Powell, Torrington, Kemmerer, Dubois, Saratoga, Wheatland, Lost Springs, Afton, Ten Sleep, Elk Mountain, Lusk, Greybull, Basin, Medicine Bow, Lovell, Newcastle, Big Piney, Fort Laramie, Glenrock, Willwood, Meeteetse, Alpine, Pine Bluffs, Goose Egg, Kaycee, Grand Encampment, Guernsey, Opal

Counties ▼

Counties in Wyoming: Albany, Big Horn, Campbell, Carbon, Converse, Crook, Fremont, Goshen, Hot Springs, Johnson, Laramie, Lincoln, Natrona, Niobrara, Park, Platte, Sheridan, Sublette, Sweetwater, Teton, Uinta, Washakie, Weston


State website

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