Underglow in Pennsylvania
Underglow may not be used on public roads in Pennsylvania. All aftermarket underglow is prohibited on public roads regardless of color — Pennsylvania permits only the lamps enumerated in its vehicle code, and underglow is not among them.
Verified against primary sources · September 2026
What the law says
All aftermarket underglow is prohibited on public roads regardless of color — Pennsylvania permits only the lamps enumerated in its vehicle code, and underglow is not among them. Mounting the lighting is not itself an offense; using it on a public road is. Private property is where it can be run.
Specific Limits
- Allowed
- parked on private property
- While driving
- prohibited
Exceptions & Exemptions
No lamp not enumerated in 67 Pa. Code § 175.66 and not available as original equipment is permitted for road use — regardless of color. A non-enumerated lamp can also fail inspection even when switched off.
Frequently Asked Questions
Are underglow legal in Pennsylvania?
What are the exact underglow limits in Pennsylvania?
Are there exceptions for underglow in Pennsylvania?
Street-legal underglow picks
Gear that helps you mod without a ticket in Pennsylvania.
The glow that's legal in every state — inside the cabin instead of under it.
Shop on AmazonCheck your state's color and flashing rules before running these on public roads.
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