Underglow in Vermont

What the law says

23 V.S.A. § 1251(a), as rewritten by 2023 Act 165 (effective July 1, 2024), prohibits operating with a siren, an emergency warning lamp, or a blue light of any kind without a permit, and bans non-emergency lamps that produce a flashing light in a color other than amber — flashing amber is expressly tolerated, and steady amber is a standard lamp color. Reflector-equipped devices over 4 candlepower need Commissioner approval during lighting hours (§ 1246). The inspection manual fails any vehicle displaying red or blue lights without a § 1253 permit.

Specific Limits

Colors

no blue of any kind without a permit; red requires a permit (rear red standard); flashing in any color other than amber prohibited

Approval

reflector-equipped devices over 4 candlepower need Commissioner approval during lighting hours

Exceptions & Exemptions

Underglow lights must not be red, blue, or flashing. Red lights are restricted to rear of vehicle only. Blue lights are reserved for emergency vehicles. Flashing lights are prohibited except for turn signals and hazard lights.

Statute

23 V.S.A. §§ 1251, 1254, 1246, 1253