Arizona headlight laws require every vehicle on a public road to have working headlamps, turned on from sunset to sunrise and any time visibility drops enough that you can’t clearly see people and vehicles ahead. The statutes also spell out how many headlamps you need, how high they can sit, when to switch between high and low beams, what colors can face forward, and how fog lamps and other auxiliary lights fit in. Get any of it wrong and you can be cited, and some aftermarket lighting choices create problems that reach beyond a traffic ticket.
When You Have to Use Headlights
Headlights must be on any time from sunset to sunrise.1Arizona Legislature. Arizona Code 28-922 – Lighted Lamps Required The duty also kicks in during the day whenever there isn’t enough light to clearly see people and vehicles on the road ahead. That covers heavy rain, dust storms, fog, and the overcast conditions common during monsoon season. Arizona doesn’t have a separate “wipers on, headlights on” rule, but the insufficient-light standard catches most of the same situations.
If visibility has dropped noticeably, turn the headlights on regardless of the clock. Daytime running lights alone don’t satisfy the statute, because DRLs generally don’t activate your taillights, and drivers behind you lose the ability to see you.
How Many Headlamps and What Condition
A standard car, truck, or SUV must have at least two headlamps, one on each side of the front. Motorcycles, all-terrain vehicles, 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 in proper working condition and adjustment at all times. Arizona’s general equipment statute makes it illegal to drive or even move a vehicle on a highway if its lamps aren’t working correctly.3Arizona Legislature. Arizona Code 28-921 – Applicability of Article A burned-out headlamp is a citable violation the moment you pull onto a public road. The same statute allows you to add parts and accessories as long as they don’t conflict with the lighting rules elsewhere in the chapter.
Mounting Height
Arizona regulates how high headlamps sit on the vehicle, measured from the center of the lamp to the ground when the vehicle is unloaded.4Arizona Legislature. Arizona Code 28-923 – Visibility Distance; Mounted Height of Lamps This is where lifted trucks and custom builds get into trouble. Headlamps mounted too high throw light into oncoming drivers’ eyes even on low beams. Too low and the road ahead isn’t lit enough.
Fog lamps have a stricter height window. They must sit between twelve and thirty inches above the road surface.5Arizona Legislature. Arizona Code 28-938 – Spot and Auxiliary Lamps That low position is deliberate, since fog lamps are meant to cut under a layer of moisture or dust rather than bounce off it.
High Beams and Low Beams
At night or in poor visibility, you have to use a beam strong enough to reveal people and vehicles at a safe distance ahead. On dark rural highways, that typically means high beams for maximum range. Two situations require you to switch down:
- Oncoming traffic within 500 feet. Drop to low beams before you close within 500 feet of an approaching vehicle. The statute treats the low beam distribution as sufficient to avoid glare regardless of road contour or vehicle load.
- Following within 200 feet. When you’re behind another vehicle at less than 200 feet, use low beams. The exception is while you’re actively overtaking and passing.
These distances come from ARS 28-942.6Arizona Legislature. Arizona Code 28-942 – Multiple Beam Road Lighting Equipment Usage Five hundred feet is roughly a football field and a half. If you can see an oncoming vehicle’s headlights on a straight road, you’re likely already inside that range. Failing to dim is one of the most common headlight violations officers cite.
Legal Colors Facing Forward
Any light visible from directly in front of your vehicle must be white or amber.7Arizona 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 must display red.
Colored LED strips, blue-tinted headlight covers, and novelty accent lights that point forward all risk violating this rule. The exception is narrow, covering authorized emergency vehicles and certain law enforcement applications.
Fog Lamps, Spot Lamps, and Other Auxiliary Lights
Arizona allows several kinds of supplemental forward-facing lights, but caps each one. You can have no more than one spot lamp, and it must be aimed and used so it doesn’t blind other drivers when you approach them. You can mount up to two fog lamps on the front, subject to the twelve-to-thirty-inch height rule.5Arizona Legislature. Arizona Code 28-938 – Spot and Auxiliary Lamps
Total forward-facing illumination is where people go wrong. Running a light bar, driving lights, fog lamps, and headlamps together can push past what the statute allows. Off-road use and public-highway use are treated differently, and gear that’s legal on a trail can still get you cited on the street.
Aftermarket Bulbs and Federal Law
Arizona’s statutes don’t specify which bulb technology you can use, but federal law does. Original headlamps are designed 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 cannot knowingly make inoperative any safety device or element installed to comply with a federal safety standard.8Office of the Law Revision Counsel. 49 USC 30122 – Making Safety Devices and Elements Inoperative
NHTSA has said repeatedly that HID conversion kits installed in housings designed for halogen bulbs fail to meet FMVSS 108. The same reasoning applies to many LED conversion bulbs dropped into reflector housings engineered for a different light source. Beam patterns scatter, glare increases, and the headlamp no longer performs the way it was certified to.
A shop that installs an HID or LED conversion kit in a halogen-designed housing is potentially violating federal law. Vehicle owners aren’t directly covered by § 30122, which targets businesses, but you’re still subject to Arizona’s requirement that your headlamps work within legal specifications. If a converted headlamp throws excessive glare or fails to illuminate the road properly, you can be cited under state law regardless of who did the install.
Penalties, Points, and Fix-It Citations
A headlight equipment violation in Arizona is generally handled as a civil traffic violation. A burned-out headlamp, headlamps at the wrong height, or illegal aftermarket lighting can all draw a citation. Arizona’s civil traffic fines carry a base amount plus mandatory surcharges and court assessments, so the total you pay runs well above the base figure.
The bigger risk is how these violations interact with your driving record. Arizona’s point system assigns points for moving traffic violations, and accumulating eight or more points within any twelve-month period can trigger mandatory Traffic Survival School attendance or a license suspension of up to twelve months.9Arizona Department of Transportation. Points Assessment A single headlight ticket probably won’t get you there, but combined with other violations from the same stop, or with other tickets across the year, points build faster than most drivers expect.
Equipment citations often come with a fix-it component: bring the vehicle into compliance and show proof to the court. Handling it promptly can reduce or resolve the fine in some courts. Ignoring it adds penalties and can create registration problems. If you’ve modified your lighting and aren’t sure whether it’s legal, an inspection before a traffic stop is cheaper than the citation afterward.