Wisconsin Neon Underglow Laws

Wisconsin, with its picturesque landscapes and vibrant cities, is a place where individuality meets tradition. Many vehicle owners seek to express themselves through customization, and one popular way to do so is by adding neon underglow lighting. However, before you illuminate your vehicle’s underside, it’s essential to understand the laws governing neon underglow in the state of Wisconsin. This article delves into the specifics of Wisconsin’s regulations, helping you strike a balance between style and legality.

Wisconsin vehicle lighting laws

Here are selected excerpts from the Wisconsin Vehicle Code that define regulations for the installation of aftermarket lights on vehicles.

347.02 Applicability of chapter.

[…] (2) No provision of this chapter requiring or prohibiting certain types of equipment on a vehicle is applicable when such vehicle is not operated upon or occupying a highway. […]

(3) Nothing in this chapter shall be construed to prohibit the use of additional parts and accessories on any vehicle not inconsistent with this chapter.

347.07  Special restrictions on lamps and the use thereof.

(2) Except as provided in sub. (3), or as otherwise expressly authorized or required by this chapter, no person shall operate any vehicle or equipment on a highway which has displayed thereon:
(a) Any color of light other than white or amber visible from directly in front; or
(b) Any color of light other than red on the rear; or
(c) Any flashing light.
(3) A motorcycle may be equipped with a lighting device that illuminates the ground directly beneath the motorcycle if all of the following apply:
(a) The lighting device is not visible to approaching vehicles.
(b) The lighting device does not display a red, blue, or amber light.
(c) The lighting device does not display a flashing, oscillating, or rotating light.

347.13  Tail lamps and registration plate lamps.

[…] (3) No person shall operate on a highway during hours of darkness any motor vehicle upon the rear of which a registration plate is required to be displayed unless such motor vehicle is equipped with a lamp so constructed and placed as to illuminate with a white light the rear registration plate […]

347.25  Special warning lamps on vehicles.

(1) […] authorized emergency vehicle may be equipped with one or more flashing, oscillating, or rotating red lights, except that ambulances, fire department equipment […]

(a) A police vehicle under s. 340.01 (3) (a) may be equipped with a blue light and a red light which are flashing, oscillating or rotating. […]

4) No vehicle may be equipped with or display any blue colored light or lamp unless the vehicle is used in police work authorized by the state or a political subdivision of the state or is used by a fire department as authorized under sub. (1s). […]

347.26  Restrictions on certain optional lighting equipment.

[…] (11) Flashing warning lamps.

(a) Any vehicle may be equipped with lamps which may be used for the purpose of warning the operators of other vehicles of the presence of a vehicular traffic hazard […] shall display simultaneously flashing white or amber lights, or any shade of color between white and amber. […]

Wisconsin’s Stance on Neon Underglow

Wisconsin law has specific guidelines and restrictions regarding neon underglow lighting on vehicles. To ensure compliance and avoid legal issues, it’s important to understand the following regulations:

Legal Colors:

Wisconsin allows neon underglow lighting, but it restricts the colors you can use. Underglow lights in Wisconsin should emit only white or amber light. Using any other colors may result in violations.

Placement Rules:

Neon underglow lights in Wisconsin should be installed on the vehicle’s exterior in such a way that they don’t obstruct the driver’s vision or create unnecessary distractions for other road users. Proper placement is key to compliance.

Use on Public Roads:

While Wisconsin permits neon underglow, it’s crucial to remember that these lights should not be used while the vehicle is in motion on public roads. They can be used when the vehicle is parked or at a standstill.

Flashing and Rotating Lights:

Wisconsin law prohibits flashing, oscillating, or rotating lights on vehicles, including neon underglow. This means that static, non-moving lights are the only acceptable option.


Violations of Wisconsin’s neon underglow regulations can result in fines and potential traffic citations. It’s important to abide by the rules to avoid legal consequences.

According to Article 347.30, non-compliance with vehicle lighting regulations can result in fines ranging from $10 to $200.

347.30  Penalty for violating lighting equipment requirements.

(1) Any person violating s. 347.06 or 347.13 (2), (3) or (4) may be required to forfeit not less than $10 nor more than $20 for the first offense and not less than $25 nor more than $50 for the 2nd or subsequent conviction within a year.
(2) Any person violating ss. 347.03, 347.07 to 347.12, 347.13 (1) or 347.14 to 347.29 may be required to forfeit not less than $10 nor more than $200.

Local Ordinances:

Be aware that some local municipalities within Wisconsin may have additional regulations or restrictions regarding neon underglow. Always check with local law enforcement or city ordinances for any specific rules that may apply in your area.


Wisconsin offers some flexibility when it comes to neon underglow lighting, but it comes with clear restrictions. By following the state’s regulations, which emphasize the use of white or amber lights and proper placement, vehicle owners can personalize their rides while staying on the right side of the law. Remember that underglow lights should be used when the vehicle is parked, and flashing or rotating lights are not allowed.

As you traverse Wisconsin’s scenic roads, you can add a touch of personal style to your vehicle with neon underglow while adhering to state regulations. It’s essential to stay informed about any updates or changes in the law and consult with local law enforcement if you have any concerns or questions about the use of neon underglow on your vehicle in Wisconsin.

FAQs About Wisconsin Neon Underglow Laws

Here are answers to your frequently asked questions regarding underglow lights in Wisconsin:

Are Underglow Lights Legal in Wisconsin?

Yes, underglow lights are legal in Wisconsin, but they are subject to certain restrictions and regulations.

2. When Is It Legal to Use Underglow Lights in Wisconsin State?

It is legal to use underglow lights in Wisconsin as long as they comply with the state’s regulations. They should emit white or amber light and be used when the vehicle is parked or at a standstill.

3. When Is It Illegal to Use Underglow Lights In Wisconsin?

It is generally considered illegal to use underglow lights in Wisconsin if they emit colors other than white or amber, are used while the vehicle is in motion on public roads, or if they flash or rotate.

4. Is It Illegal to Install Underglow Lights In Wisconsin?

Installing underglow lights is not explicitly illegal in Wisconsin. However, they must adhere to the state’s regulations, particularly regarding color and use.

5. What Wisconsin Vehicle & Traffic Law Restricts Use of Lights On Motorcycles?

Wisconsin’s vehicle and traffic laws apply to motorcycles as well, and the same restrictions and regulations typically extend to underglow lights on motorcycles.

6. Are Multicolored Underglow Lights Illegal in Wisconsin?

Using multicolored underglow lights is generally not allowed in Wisconsin. The lights should emit only white or amber light.

7. Wisconsin Traffic Ticket/Summons for Under Glow Lights on a Motorcycle

Violating Wisconsin’s regulations on underglow lights can result in fines and potential traffic citations. Penalties can vary based on the circumstances and law enforcement discretion.

8. Are Under Glow Lights Legal While Parked in Wisconsin?

Underglow lights are generally legal to use while parked in Wisconsin, as long as they comply with state regulations.

9. Are Motorcycle Wheel Lights Legal in Wisconsin?

Motorcycle wheel lights are subject to the same regulations as other underglow lights in Wisconsin. They should emit white or amber light and comply with state guidelines.

10. Is the Law for Underglow Lights the Same for Cars and Motorcycles in Wisconsin?

Wisconsin’s regulations on underglow lights typically apply to both cars and motorcycles, with the same color and use restrictions for both vehicle types.

It’s important to stay informed about any updates or changes in the law and consult with local law enforcement if you have specific questions or concerns about the use of underglow lights on your vehicle in Wisconsin. Laws and regulations can change over time, so it’s advisable to verify the current status of underglow lighting regulations in the state.


Location: Wisconsin is a state located in the northern part of the United States. It is known for its diverse geography, including forests, lakes, and urban areas.

Capital: Madison

Largest City: Milwaukee

Cities in Wisconsin: Milwaukee, Madison, Green Bay, Wisconsin Dells, Oshkosh, Appleton, Eau Claire, Kenosha, Waukesha, Wausau, La Crosse, Racine, Sheboygan, Manitowoc, Stevens Point, Fond du Lac, Lake Geneva, Wauwatosa, Janesville, Neenah, New Berlin, West Bend, Menomonee Falls, Beloit, Brookfield, New Glarus, Chippewa Falls, Sun Prairie, De Pere, Mequon, West Allis, Cedarburg, Marshfield, Menomonie, Pleasant Prairie, Port Washington, Oak Creek, Rhinelander, Bell Center, Baraboo, Sturgeon Bay, Wisconsin Rapids, Hustler, Kaukauna, River Falls, Superior, Kohler, Bayfield, Fitchburg, Muskego

Statehood: Wisconsin became the 30th state of the United States on May 29, 1848.

Nickname: “The Badger State” – This nickname dates back to the 19th century when lead miners in Wisconsin would live in temporary caves or “badger dens,” and they became known as “badgers.”

Population: 5,726,398

Geography: Wisconsin boasts diverse landscapes, including forests, lakes, and farmland. The state is situated between the Great Lakes, Lake Superior to the north, Lake Michigan to the east, and is known for its beautiful parks and natural attractions.

Economy: Wisconsin’s economy is driven by a variety of industries, including manufacturing, agriculture, healthcare, and tourism. It is known for its production of dairy products, beer, and paper.

Education: Wisconsin has a strong education system, including the University of Wisconsin System, a network of public universities. The flagship institution is the University of Wisconsin-Madison.

Government: Wisconsin has a state government with a Governor, State Legislature, and a bicameral legislature consisting of a Senate and Assembly. It follows the same democratic structure as the rest of the United States.

Culture: Wisconsin has a rich cultural heritage with influences from Native American, European, and immigrant populations. The state is known for its love of sports, including football, and its vibrant arts scene.

Natural Attractions: Wisconsin is home to numerous natural attractions, including the beautiful Door Peninsula, Apostle Islands, and the Ice Age National Scenic Trail. The state’s many lakes offer opportunities for boating and outdoor recreation.

Underglow law references:

Wisconsin Vehicle Code, Chapter 347: Equipment of Vehicles, Subchapter 2: Lighting Equipment.

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