No, underglow lighting is prohibited on public roads in Washington. State law (RCW 46.37.530) classifies non-essential vehicle lighting—including underglow—as illegal when visible from the front, sides, or rear during vehicle operation. Local jurisdictions like Seattle and Spokane enforce additional restrictions, and 2026 updates to the Washington State Patrol’s vehicle equipment manual may further tighten enforcement.
Key Regulations for Underglow Lighting in Washington
- Color Restrictions: Only white or amber lights are permitted on the front of vehicles; red, blue, or green underglow is banned statewide.
- Visibility Limits: Underglow must not be visible from public roads when the vehicle is in motion, per RCW 46.37.530(2).
- Permitted Use: Underglow is legal only in off-road or private property contexts, with no active enforcement for trailers or show vehicles not operated on public streets.
Washington’s Department of Licensing (DOL) aligns with the Washington State Patrol (WSP) in treating underglow as a non-compliant modification. Violations may result in citations under equipment standards, with potential fines up to $124. Recent 2026 draft guidelines from the WSP emphasize stricter inspection protocols for aftermarket lighting during vehicle registration renewals.