IS MY MOD LEGAL?

Light Bars & LED Lighting in Vermont

Conditional

Vermont has the strictest approval threshold in the country: no lighting device over 4 candlepower equipped with a reflector may be used on a highway unless the Commissioner has approved the device, lens, and candlepower.

Verified against primary sources · August 2026

What the law says

The beam must not rise more than 6 inches above bulb height at 75 feet and never more than 42 inches above the surface. No cover requirement exists — approval is the gate. Contrary to widely repeated advice, no cover is required in this state — the rule is simply that the lamps are off on the highway. Mounting a light bar is legal everywhere; what states regulate is using it on public roads, and the usual constraint is a mounting-height ceiling plus a per-type lamp count.

Specific Limits

Beam
must not rise more than 6 in above bulb height at 75 ft, and never more than 42 in above the surface
Cover required
No
Approval threshold
no lighting device over 4 candlepower with a reflector may be used on a highway unless the device, lens, and candlepower are approved by the Commissioner

Statute

23 V.S.A. §§ 1246, 1243

Read the statute →

Frequently Asked Questions

Are light bars & led lighting legal in Vermont?
Vermont has the strictest approval threshold in the country: no lighting device over 4 candlepower equipped with a reflector may be used on a highway unless the Commissioner has approved the device, lens, and candlepower.
What are the exact light bars & led lighting limits in Vermont?
Beam: must not rise more than 6 in above bulb height at 75 ft, and never more than 42 in above the surface. Cover required: No. Approval threshold: no lighting device over 4 candlepower with a reflector may be used on a highway unless the device, lens, and candlepower are approved by the Commissioner. Source: 23 V.S.A. §§ 1246, 1243.

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