Pennsylvania Neon Underglow Laws : Is neon underglow legal in Pennsylvania?

Adding neon underglow lights to your vehicle is a fantastic way to customize and make a statement while cruising the roads of Pennsylvania. However, it’s crucial to understand the specific regulations that govern neon underglow in the state to ensure you express your style responsibly and within the bounds of the law. In this detailed blog post, we’ll explore Pennsylvania’s neon underglow laws, what’s allowed, what’s not, and how you can enjoy these vibrant additions to your vehicle while staying on the right side of the law.

Is neon underglow legal in Pennsylvania?

Pennsylvania law expressly forbids the use of additional aftermarket vehicle lighting, which includes neon underglow. Therefore, our assessment is that neon underglow is illegal in Pennsylvania.

There are no provisions in Pennsylvania law that permit the use of undercarriage lights while driving, and the law strictly prohibits the use of any lamps not specifically specified in the Pennsylvania Vehicle Code.

Pennsylvania Neon Underglow laws

Here are the pertinent excerpts from the Pennsylvania Vehicle Code that define and regulate the installation of specific aftermarket lights on vehicles.

§ 175.66. Lighting and electrical systems

[…] (h)  Ornamental lamps. A lamp not enumerated in this section and not located as described in Tables III, IV and V of this chapter, is prohibited unless it is available as original equipment. An illuminated sign is prohibited except on taxicabs, ambulances and trucks. Flashing or revolving lights are not ornamental lamps. Provisions relating to flashing or revolving lights are in Chapters 15 and 173 (relating to authorized vehicles and special operating privileges; and flashing or revolving lights on emergency and authorized vehicles).

Pennsylvania Neon Underglow Laws: The Essentials

Pennsylvania’s laws regarding neon underglow lights are designed to strike a balance between individual expression and road safety. Here are the key points you need to know:

  1. Permissible Colors: Pennsylvania generally allows neon underglow lights, but there are color restrictions. Red, blue, and green lights are typically reserved for emergency and law enforcement vehicles and are prohibited on civilian vehicles. However, other colors, such as white, amber, or purple, are usually acceptable.
  2. Placement: Neon underglow lights should be installed on the sides of the vehicle and should not be visible from the front. They must not obstruct the driver’s view of the road.
  3. Flashing Lights: Flashing or oscillating neon underglow lights are not permitted on public roads. Steady, non-flashing lights are generally acceptable, provided they adhere to the color and placement restrictions.
  4. Distraction: Neon underglow lights should not be excessively bright or distracting, as they can impair other drivers’ vision or pose a hazard on the road.

Penalties for Violations

Violating Pennsylvania’s neon underglow laws can result in penalties, including fines or warnings from law enforcement. To avoid legal issues, it’s crucial to follow the regulations carefully.

Stay Informed

Laws and regulations can change over time, so it’s advisable to consult up-to-date sources, such as the Pennsylvania Department of Transportation or local law enforcement, to ensure compliance with the most current information.

Safety Considerations

While neon underglow lights can enhance the aesthetics of your vehicle, safety should always be a top priority. Here are a few safety tips to keep in mind when using neon underglow lights in Pennsylvania:

  1. Responsible Usage: Use neon underglow lights responsibly, especially in residential areas, and avoid overusing them to prevent disturbances.
  2. Regular Maintenance: Ensure that your neon lights are in good working condition and securely attached to your vehicle to prevent accidents or light malfunctions.
  3. Environmental Awareness: Be considerate of the environment and other drivers. Adjust the brightness and usage of your neon lights to avoid causing distractions or discomfort to fellow road users.


Personalizing your vehicle with neon underglow lights in Pennsylvania is a creative way to express your style and stand out on the road. However, it’s essential to understand and adhere to the state’s laws and regulations to avoid legal troubles and ensure road safety. By following the permissible colors, placement restrictions, and other rules, you can enjoy your neon underglow lights while staying within the bounds of the law. Remember that laws can change, so it’s advisable to stay informed and consult up-to-date sources for the latest regulations in Pennsylvania.

Frequently Asked Questions (FAQs) about Underglow Lights in Pennsylvania:

Are Underglow Lights Legal in Pennsylvania?

  • Neon underglow lights are generally legal in Pennsylvania, subject to specific regulations and restrictions.

When Is It Legal to Use Underglow Lights in Pennsylvania State?

  • Neon underglow lights can be used in Pennsylvania as long as they comply with the state’s regulations, including permissible colors and placement restrictions.

When Is It Illegal to Use Underglow Lights In Pennsylvania?

  • It is generally illegal to use red, blue, and green neon underglow lights in Pennsylvania. These colors are typically reserved for emergency and law enforcement vehicles. Violating these restrictions may result in legal consequences.

Is It Illegal to Install Underglow Lights In Pennsylvania?

  • Installing neon underglow lights in Pennsylvania is not explicitly illegal, provided they adhere to the permissible colors and placement regulations outlined in state law.

What Pennsylvania Vehicle & Traffic Law Restricts Use of Lights On Motorcycles?

  • The same Pennsylvania Vehicle & Traffic Law restrictions that apply to cars regarding neon underglow lights also apply to motorcycles. These regulations are consistent for both cars and motorcycles.

Are Multicolored Underglow Lights Illegal in Pennsylvania?

  • Using multicolored neon underglow lights, especially red, blue, and green, is generally illegal in Pennsylvania. The state typically allows only specific colors.

Pennsylvania Traffic Ticket/Summons for Under Glow Lights on a Motorcycle

  • Violating the neon underglow restrictions in Pennsylvania may lead to receiving a traffic ticket or summons.

Are Under Glow Lights Legal While Parked in Pennsylvania?

  • Neon underglow lights are generally legal for use on a parked vehicle in Pennsylvania as long as they adhere to state regulations.

Are Motorcycle Wheel Lights Legal in Pennsylvania?

  • The legality of motorcycle wheel lights in Pennsylvania is subject to the same regulations as underglow lights on other vehicles.

Is the Law for Underglow Lights the Same for Cars and Motorcycles in Pennsylvania?

  • Yes, the same laws and regulations regarding underglow lights apply to both cars and motorcycles in Pennsylvania.

Pennsylvania Underglow law references:

Pennsylvania Code: § 175.66. Lighting and electrical systems.

Pennsylvania Code Chapter 153: Lamps, Reflective Devices and Associated Equipment [required vehicle lighting]

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