California headlight laws require you to turn your headlights on from a half hour after sunset until a half hour before sunrise, any time visibility drops below 1,000 feet, and any time weather forces you to run your windshield wipers continuously. The rules live mainly in Vehicle Code Sections 24250 and 24400, and breaking them is an infraction that usually costs around $230 once court fees are added, plus a point on your driving record.
When Your Headlights Have to Be On
Section 24250 is short. It says every vehicle’s lighting equipment must be turned on “during darkness.”1California Legislative Information. California Code VEH 24250 The trick is how the code defines that word. Under Section 280, “darkness” covers the period from half an hour after sunset to half an hour before sunrise, and also any other time when visibility is poor enough that you can’t clearly see a person or vehicle on the road 1,000 feet away.2California Legislative Information. California Code VEH 280
That second half catches a lot of drivers. Heavy fog, dense smoke, or a hard rain at two in the afternoon can all meet the legal definition of darkness even with the sun up. If you can’t see clearly for 1,000 feet, your lights belong on.
The Wipers Rule
Section 24400 adds a separate requirement aimed specifically at headlamps. Every motor vehicle other than a motorcycle must have at least two lighted headlamps on during darkness or inclement weather. The statute defines inclement weather two ways: conditions that block clear visibility at 1,000 feet, or conditions that force you to run your wipers continuously because of rain, snow, fog, or other moisture.3California Legislative Information. California Code VEH 24400
The shorthand: wipers on, headlights on. And headlights means headlights. Parking lights and daytime running lamps don’t satisfy Section 24400, because daytime running lamps typically illuminate only the front of the car. Drivers behind you in the spray get no help from them.
High Beams and Low Beams
Section 24409 sets two specific distances. You must dim your high beams when you come within 500 feet of an oncoming vehicle, and you must switch to low beams whenever you are within 300 feet of a vehicle you are following.4California Legislative Information. California Code VEH 24409 The same section also requires your headlights to be aimed and bright enough to reveal people and vehicles at a safe distance ahead during darkness, which is why low beams alone are often not appropriate on an unlit rural road with no oncoming traffic.
Color Rules and Aftermarket Bulbs
Section 25950 sets the color scheme for the whole vehicle. Anything visible from the front must be white or yellow. Anything visible from the rear must be red.5California Legislative Information. California Vehicle Code 25950 Narrow exceptions exist: backup lamps must be white, rear turn signals can be yellow, fog lamps can run from white to yellow.
Where drivers get in trouble is aftermarket work. Blue-tinted bulbs, colored underglow visible from the road, and red or green accent lamps facing forward all violate the color scheme. Having non-compliant lights installed can be the violation on its own, even if you only switch them on at car meets. Federal Motor Vehicle Safety Standard 108 also governs headlight color, brightness, and placement, so aftermarket LEDs need to meet that standard as well.
Bulbs Have to Work All the Time
Section 24252 requires all mandatory lighting equipment to be maintained in good working order at all times.6California Legislative Information. California Code VEH 24252 A burned-out tail lamp is a violation at noon, not just after sundown, because the statute says “at all times.” Bulbs also have to match the correct voltage rating for their socket.
Once a month, walk behind the car while someone presses the brake and cycles the turn signals. Check the headlights, high beams, license plate lamp, and reverse lamps. It takes five minutes and prevents one of the most common reasons drivers get pulled over.
Automatic Headlights Are Not a Defense
Most newer vehicles have light sensors that turn the headlights on when it gets dark. Convenient, but not a legal shield. If the sensor doesn’t fire during a rainstorm or at dusk, you are still the one holding the ticket. California law puts the responsibility for the vehicle’s safety equipment on the driver, and a malfunctioning or slow-to-react sensor is not a defense.
Know where your manual switch is. Tunnels, heavy tree cover, sudden fog banks, and hard rain can all fool an automatic system, and daytime running lamps generally do not activate your tail lamps. Flipping the headlamp switch to on turns on the full front-and-rear lighting system.
What a Ticket Actually Costs
A lighting violation is normally charged as an infraction. The base fine sounds small, often $25 to $35, but California layers on a state penalty assessment, a county penalty, a DNA fund penalty, a court construction fee, a surcharge, and a court operations assessment. On a $35 base fine, the total lands around $230.7California Courts. Uniform Bail and Penalty Schedules 2026 The exact figure varies by county, but the final number typically runs five to seven times the base.
A conviction under Section 24250 also adds one point to your driving record.8Santa Clara County Superior Court. Vehicle Code Violations Used in Negligent Operator Counts The point stays on your record for three years, can push up your insurance premium, and contributes toward the point totals that trigger a DMV negligent-operator license suspension.
Fix-It Tickets
Equipment problems like a burned-out headlamp or a broken tail light usually qualify as correctable violations. Under Section 40522, the officer can write the citation as a “fix-it ticket,” which requires you to repair the problem and prove it by your court date.9California Legislative Information. California Vehicle Code 40522 Fix the bulb, take the car to a law enforcement officer to sign the certificate of correction on the back of the ticket, and submit that proof to the court with a $25 dismissal fee. The charge is dropped, and no point attaches. Ignoring the ticket until the deadline passes converts a $25 outcome into the full fine plus the point, so handle it promptly.
A Note on Flashing and Colored Lights
Emergency vehicles operate under separate provisions in Sections 25252 through 25259, which authorize specific red, blue, amber, and white warning lamps for police, fire, and ambulance use.10Department of California Highway Patrol. CHP 884 – Warning Lamps for Authorized Emergency Vehicles and Special Hazard Vehicles For a regular driver, the point is simple: flashing red or blue lights are reserved for authorized emergency vehicles, and installing them on your personal car is illegal on its own.