Arizona headlight laws require every vehicle on a public road to have working headlamps, use them from sunset to sunrise and whenever visibility is poor, switch between high and low beams at set distances, and avoid colors or aftermarket setups that violate state or federal lighting standards. Get any of it wrong and you’re looking at a civil traffic citation, points on your record, and, for some aftermarket conversions, a problem that runs deeper than a ticket.
When You Have to Turn Them On
Headlights are required from sunset to sunrise, every day.1Arizona Legislature. Arizona Code 28-922 – Lighted Lamps Required They’re also required any time there isn’t enough light to clearly see people and vehicles on the road ahead. That standard covers heavy rain, dust storms, fog, and the kind of overcast weather that comes with monsoon season. Arizona has no separate “wipers on, lights on” rule, but the low-visibility standard catches most of the same situations.
If visibility has dropped and you’re relying on your daytime running lights, you’re not covered. DRLs usually don’t activate your taillights, so drivers behind you lose sight of your vehicle even if the road ahead looks fine to you. When in doubt, flip the headlights on.
How Many Headlamps You Need, and in What Condition
A standard car, truck, or SUV must have at least two headlamps, one on each side of the front. Motorcycles, ATVs, and motor-driven cycles need at least one and can have up to two.2Arizona Legislature. Arizona Code 28-924 – Motor Vehicle Head Lamps
Every headlamp has to be working and properly adjusted whenever the vehicle is on a public road.3Arizona Legislature. Arizona Code 28-921 – Applicability of Article A burned-out headlamp is a citable violation the moment you pull out of your driveway, not just once night falls. Mounting height matters too: lamp height is measured from the center of the lamp to level ground on an unloaded vehicle.4Arizona Legislature. Arizona Code 28-923 – Visibility Distance; Mounted Height of Lamps Lifted trucks and heavily modified suspensions are the common offenders. Push the headlamps too high and they blind oncoming drivers even on low beam; too low and you can’t see the road.
High Beams and Low Beams
At night or in low visibility, you need a beam strong enough to show people and vehicles at a safe distance ahead. On dark rural highways, that usually means high beams. But you have to drop to low beams in two specific situations under ARS 28-942:5Arizona Legislature. Arizona Code 28-942 – Multiple Beam Road Lighting Equipment Usage
- When an oncoming vehicle is within 500 feet, you have to be on low beams before you reach that distance.
- When you’re following another vehicle closer than 200 feet, you have to be on low beams. The only exception is while actively overtaking and passing.
Five hundred feet is roughly a football field and a half. On a straight road, if you can see oncoming headlights at all, you’re probably already inside that range. Failing to dim is one of the most common headlight citations officers write, and it’s the kind of small thing that turns into a traffic stop.
Legal Colors Facing Forward
Any light visible from directly in front of your vehicle has to be white or amber.6Arizona Legislature. Arizona Code 28-947 – Special Restrictions on Lamps Red lights and red-and-blue combinations facing forward are prohibited for non-emergency vehicles. Rear-facing lights and reflectors have to be red.
This is where a lot of aftermarket choices go sideways. Colored LED accent strips, blue-tinted headlight covers, and novelty lights that face forward all risk a citation under ARS 28-947. The exceptions for authorized emergency and historic emergency vehicles are narrow and don’t cover ordinary drivers.
Fog Lamps, Spot Lamps, and Auxiliary Lighting
Arizona allows some supplemental forward-facing lights, each with a cap. You can run no more than one spot lamp, and it has to be aimed and used so it doesn’t blind oncoming drivers. You can mount up to two fog lamps on the front, and they must sit between twelve and thirty inches above the road surface.7Arizona Legislature. Arizona Code 28-938 – Spot and Auxiliary Lamps That lower height is deliberate: fog lamps are meant to cut under the layer of moisture or dust, which is why mounting them at headlamp height defeats their purpose.
The trap for truck and off-road owners is total forward-facing illumination. Light bars, driving lights, fog lamps, and headlamps all firing at once can easily push you past what the statute permits on a public road. Off-road rules and highway rules aren’t the same thing. If you’ve added auxiliary lighting, know which combinations are legal to run once you’re back on pavement.
Aftermarket LED and HID Conversions
Arizona’s statutes don’t spell out which bulb technologies you can use. Federal law does, and it’s stricter than most drivers realize. The original headlamps on your vehicle were built to meet Federal Motor Vehicle Safety Standard No. 108, which governs brightness, color, beam pattern, and placement.
Under 49 U.S.C. § 30122, a repair shop, dealer, or manufacturer can’t knowingly disable or compromise a safety device installed to meet a federal safety standard.8Office of the Law Revision Counsel. 49 USC 30122 – Making Safety Devices and Elements Inoperative NHTSA has repeatedly stated that HID conversion kits dropped into housings designed for halogen bulbs fail to meet FMVSS 108. The same logic applies to many LED conversion bulbs used in reflector housings engineered for a different light source. The beam pattern scatters, glare goes up, and the headlamp no longer performs the way it was certified to.
The federal prohibition targets businesses, not consumers, so a vehicle owner isn’t directly covered by § 30122. You are still subject to Arizona’s requirement that your headlamps work within legal specifications. A converted headlamp that throws excessive glare or fails to light the road properly can get you cited under state law no matter who installed it.
What a Headlight Ticket Costs
A headlight equipment violation in Arizona is handled as a civil traffic violation. The ticket includes a base fine plus mandatory surcharges (a 68% surcharge, court assessments, and smaller fees), so the total is well above the base fine alone.
The bigger issue is your driving record. Arizona assigns points for moving traffic violations, and reaching eight or more points in any twelve-month window can trigger mandatory Traffic Survival School or a license suspension of up to twelve months.9Arizona Department of Transportation. Points Assessment One headlight ticket on its own usually won’t get you there. Combined with other violations from the same stop or picked up over the year, the points stack up faster than most drivers expect.
Equipment citations often come with a fix-it option: bring the vehicle into compliance and show the court proof. Handling it promptly can reduce or resolve the fine in some courts. Ignoring it leads to additional penalties and can create problems with your registration. If you’ve modified your lighting and aren’t sure where you stand, having it inspected before a traffic stop is cheaper than dealing with the ticket after.