Underglow in Wisconsin
Underglow may not be used on public roads in Wisconsin. Only white or amber light may show to the front and only red to the rear, and flashing is banned — which makes most colored underglow unlawful while the vehicle is in motion.
Verified against primary sources · August 2026
What the law says
Only white or amber light may show to the front and only red to the rear, and flashing is banned — which makes most colored underglow unlawful while the vehicle is in motion. 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
Underglow lights cannot be red or blue colors, cannot flash or strobe, and cannot be visible while driving on public roads. May only be used when vehicle is parked.
Frequently Asked Questions
Are underglow legal in Wisconsin?
What are the exact underglow limits in Wisconsin?
Are there exceptions for underglow in Wisconsin?
Street-legal underglow picks
Gear that helps you mod without a ticket in Wisconsin.
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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