Texas law requires every car and truck to have at least two working headlamps, one on each side of the front, mounted 24 to 54 inches off the ground. They have to be on from 30 minutes after sunset to 30 minutes before sunrise, and any time you can't clearly see a person or vehicle 1,000 feet ahead. Headlamps must shine white, and most violations carry a fine of up to $200 plus court costs.
The tricky part is that Texas ties its lighting rules to the federal standard, FMVSS 108. That link is where most of the confusion about LED bulbs, smoked lenses, and "DOT approved" packaging comes from. This guide will walk you through the statute section by section, explain what changed when Texas dropped safety inspections in 2025, and show you how to upgrade without picking up a ticket.
Night driving deserves attention. The National Safety Council reports that only about a quarter of our driving happens after dark, yet roughly half of all traffic deaths happen at night.
Texas headlight laws at a glance
- Headlamps Required: at least 2, one on each side, 24 to 54 inches high (§ 547.321)
- When they must be on: 30 minutes after sunset to 30 minutes before sunrise, or when visibility drops below 1,000 feet (§ 547.302)
- High Beams: dim within 500 feet of oncoming traffic and within 300 feet of a car you're following (§ 547.333)
- Color: white headlamps only, through the federal standard Texas adopts (§ 547.3215)
- Fog Lights: up to 2, mounted 12 to 30 inches high (§ 547.328)
- Fine: $1 to $200 plus court costs for most equipment violations (§ 542.401)
- Inspections: no annual safety inspection for personal vehicles since January 1, 2025
How Many Headlights Does Texas Law Require, and How High Must They Be?
Texas requires at least two headlamps, with at least one on each side of the front, and each one mounted between 24 and 54 inches from the ground. That's Texas Transportation Code § 547.321.
The height is measured from the center of the lamp to the ground, with the vehicle unloaded and parked on level ground (§ 547.301). This is the rule that lifted trucks and slammed cars run into. A tall lift with bigger tires can push factory headlamps toward or past 54 inches, and a heavily lowered car can drop them under 24. If you change ride height, measure the lamp centers before and after.
Motorcycles follow their own section. A bike can have no more than two headlamps at the same 24 to 54 inch height, and at least one must be lit any time the motorcycle is running (§ 547.801).
Is It Illegal to Drive With One Headlight in Texas?
Yes, at night or in low visibility. Section 547.302 says required lamps must be lit at nighttime and whenever visibility drops under 1,000 feet, and it requires at least one lighted lamp on each side of the front. A burned-out bulb leaves one side dark, so you're out of compliance the moment the sun goes down.
In clear daylight, the duty to run your lights doesn't apply, so a dead headlight usually isn't something an officer will write up. Swap the bulb before dark anyway. One headlight also makes it harder for oncoming drivers to judge where you are on the road, and many will read you as a motorcycle.
There's a useful break built into the law. A Texas court can dismiss an equipment charge if you fix the problem before your first court appearance and pay a reimbursement fee of no more than $10 (§ 547.004(c)). Keep the receipt for the new bulb. This option doesn't apply to commercial vehicles.
Do Cloudy Headlights Count as a Violation in Texas?
Texas has no "cloudy lens" statute, but your headlamps still have to light up a person or vehicle at least 150 feet ahead on low beam and 450 feet ahead on high beam (§ 547.333). Plastic lenses haze and yellow as their UV coating breaks down, and years of Texas sun speed that up. A badly oxidized lens scatters light and cuts how far you can see, so restore or replace it before it becomes a safety issue.
Our headlight safety and maintenance guide covers cleaning and restoration.
When Are You Required to Turn On Headlights in Texas?
Texas requires your headlights in two situations, and either one is enough on its own.
- Nighttime: Texas defines nighttime as the period from 30 minutes after sunset to 30 minutes before sunrise (§ 541.401). Twilight counts. If the sun set 20 minutes ago and you can still see fine, you have 10 minutes left before the law kicks in, and most drivers are better off switching on at sunset.
- Low visibility: Lights are required whenever there isn't enough light, or the weather is bad enough, that a person or vehicle on the road isn't clearly visible 1,000 feet ahead (§ 547.302). That's roughly three football fields. Fog, dust, smoke, and heavy overcast can all trigger it in the middle of the day.
Does Texas Require Headlights When it Rains?
Not automatically. Texas doesn't have a "wipers on, lights on" law. Rain triggers the requirement only when it drops visibility below 1,000 feet, and in a real Texas downpour that happens fast. Treat your wipers as the cue to turn your headlights on. It costs nothing and keeps you legal when the storm gets worse.
Do Daytime Running Lights or Auto Headlights Count?
Not always. Daytime running lights light the front of the vehicle, and many systems leave the taillights dark. Texas requires your taillamps to be lit whenever your headlamps are (§ 547.322), so DRLs alone don't meet the law at dusk or in a storm. Automatic headlights react to how dark it is, not how far you can see, so they can stay off in fog or heavy rain.
When Do You Have to Dim Your High Beams in Texas?
Switch to low beams when an oncoming vehicle is within 500 feet, or when you're within 300 feet behind another vehicle (§ 547.333). Driving with your brights on inside those distances is a ticketable offense, usually written as failure to dim.
Outside those distances, high beams are legal and often the smart choice. The same section expects you to use enough light to see a person or vehicle at a safe distance ahead, which on an empty Hill Country road at night means high beams. Texas also allows automatic high-beam systems that switch for you, as long as the low beam stays aimed so it doesn't shine into oncoming drivers' eyes.
The statute sets minimum reach for each beam:
- High beam: must reveal a person or vehicle at least 450 feet ahead
- Low beam: must reveal a person or vehicle at least 150 feet ahead, with no part of the bright portion of the beam aimed into an oncoming driver's eyes
What Color Headlights Are Legal in Texas?
White. Texas requires all vehicle lighting to meet the federal lighting standard (§ 547.3215), and that standard, FMVSS 108, requires headlamps to emit white light. Blue, purple, red, and green headlights are not legal on Texas roads.
"White" covers more than one shade, though. In a February 2024 interpretation letter, NHTSA's Chief Counsel explained that the legal white range includes light the eye reads as slightly yellow or slightly blue. Once a headlight looks plainly blue or purple, it has left that range.
Texas law also singles out two things on its own:
- Red to the front: No vehicle other than a police vehicle may show a red light visible from directly in front (§ 547.305(b)).
- Flashing red, white, or blue: Beacon, flashing, or alternating lights in those colors are off-limits outside authorized uses like emergency vehicles (§ 547.305(c)).
Here's how common colors stack up for headlamps:
- Clear white, warm white, or cool white: legal if it stays inside the federal white range
- Visibly blue or purple: not legal
- Red or green: not legal, and red to the front is a separate violation
- Deep yellow headlight bulbs: not legal as headlamps, since headlamps must be white. Yellow fog lights are a different case, covered in the fog light section below.
Are 6000K, 6500K and 8000K Headlights Legal in Texas?
There's no Kelvin number anywhere in Texas law or FMVSS 108. Color temperature is a label on the box. The legal test is whether the light falls inside the federal white boundary, which is defined by color coordinates, not Kelvin. Two bulbs both sold as "6000K" can look noticeably different.
In practice, here's how the numbers usually read on the road:
- 4300K to 5000K: neutral white, close to factory HID
- 6000K: crisp white with a cool edge, still white to most eyes
- 6500K: cool white that starts to look slightly blue
- 8000K and higher: sold for a blue look, which is exactly what puts it at risk of leaving the white range and catching an officer's eye
Color is only half the question. A 6000K light source is legal only in a headlamp built for it, which we cover in the LED and HID sections below.
Are White Side Markers Legal in Texas?
Keep your front side markers amber. Passenger vehicles come with amber front side markers under FMVSS 108, and swapping them to white bulbs takes the vehicle out of step with the federal standard Texas adopts. Texas does separately allow up to two side cowl or fender lamps that glow white or amber without glare (§ 547.332), but those are a different lamp from your side markers.
Are LED Headlights Legal in Texas?
Factory LED headlights are legal in Texas, and so are complete LED headlamp assemblies built and DOT-marked for your vehicle. LED bulbs dropped into a headlamp designed for halogen bulbs are a different story under federal rules, and that's where most of the confusion lives.
FMVSS 108 treats a headlamp as one system: lens, reflector or projector, and light source together. NHTSA's Chief Counsel laid out where LEDs fit in a February 13, 2024 interpretation letter:
- Integral beam headlamps, where the light source is built into the assembly, may use LEDs. This is how factory LED headlights work.
- Replaceable bulb headlamps, the kind most halogen cars and trucks use, may not use any LED light source at this time. NHTSA says no LED replacement bulb has been accepted for that use.
- Installation on your own vehicle is something NHTSA generally leaves to state law.
Texas answers that last point directly. Section 547.3215 requires the lighting on a vehicle to comply with FMVSS 108, so on paper an LED bulb in a halogen housing doesn't meet the Texas standard, whatever the box claims.
What Does "DOT Approved" on the Packaging Mean?
Less than it sounds like. The Department of Transportation doesn't approve lighting products. Manufacturers self-certify that their equipment meets FMVSS 108, which is why a DOT stamp on a retrofit bulb box doesn't prove that bulb is legal in your headlamp. A DOT marking molded into the lens of a complete headlamp assembly is the one that counts.
What actually gets drivers pulled over is glare and color. A poorly focused bulb throws light above the cutoff and into oncoming drivers' eyes, and Texas separately requires the low beam to keep its bright portion out of oncoming drivers' eyes (§ 547.333). If you want LED light on a vehicle that came with halogen, the clean route is a complete LED headlamp assembly made for your vehicle.
Are Interior LED Lights Legal in Texas?
Yes. No Texas statute bans LED dome, map, or footwell lights. The limits that apply come from § 547.305: no red light visible from directly in front of the vehicle, and no red, white, or blue flashing lights. Keep accent lighting dim while you drive so it doesn't wash out your view of the road. License plate lights have to stay white (§ 547.322(f)). Interior and tag light bulbs are direct replacements for factory dome, map, and plate lamps.
Are HID Headlights Legal in Texas?
Yes, when your vehicle came with them. A factory HID (xenon) headlamp is certified with its HID bulb, and replacing a worn bulb with the same D-series type keeps it that way. If your vehicle calls for a D2S, a fresh D2S xenon bulb pair goes back into the projector and ballast it was designed for. Replace both sides together so color and output match.
Color is still the limit. Factory HID usually runs around 4300K. A 5000K bulb like our D3S Extreme White pair stays well inside the white range while looking crisper than a tired OEM bulb. Skip 8000K and higher for street use.
HID conversion kits in halogen headlamps are the problem case. NHTSA has said a conversion set can't meet FMVSS 108 for a headlamp designed around a halogen bulb (NHTSA interpretation). The arc in an HID capsule sits in a different spot than a halogen filament, so a reflector built for halogen scatters the light. Under § 547.3215, that makes a halogen-to-HID conversion non-compliant on Texas roads.
How Bright Can Headlights Be in Texas? Is There a Lumen Limit?
Texas has no lumen limit, and neither does federal law. The "3,000 lumens" cap you'll see repeated online isn't in any statute or in FMVSS 108.
The federal standard regulates headlamp intensity in candela, measured at set test points across the beam. It sets minimums so you can see the road and maximums above the cutoff line so you don't blind anyone. A lumen number on a bulb box tells you total output, not where that light lands, so it can't tell you whether a headlamp is legal.
Texas adds two rules of its own on brightness:
- Minimum reach: high beams must reveal a person or vehicle at least 450 feet ahead, and low beams at least 150 feet ahead (§ 547.333).
- Four bright lamps max: no more than four lamps brighter than 300 candlepower may be lit on the front at the same time, and your two headlamps count toward that total (§ 547.302(d)).
Is it True That Headlights "can be as bright as you want" in Texas?
No. You may have seen the line that it's illegal to cover your headlights, but they can be as bright as you want. The first half is right. The second half isn't. Brightness is capped by the federal limits above the cutoff, by the four-lamp rule, and by the requirement to dim within 500 feet of oncoming traffic.
Are Tinted or Smoked Headlights Legal in Texas?
No. Smoked film, tint spray, and tinted covers over your headlamps don't meet the federal standard that Texas law applies to every vehicle on its roads.
FMVSS 108 bars any cover in front of a headlamp lens while the headlamp is on. NHTSA explained in a 1987 interpretation letter that safety problems with headlamp covers led to that ban, and that even a new clear cover cuts light output below what the headlamp was designed to deliver. Federal law aims to regulate manufacturers and dealers. Texas closes the gap for owners, because § 547.3215 requires the lighting on your vehicle to meet FMVSS 108.
Tint causes two separate problems. It cuts the light that reaches the road, and it can shift the color away from white. Either one is enough to draw a stop.
Factory smoked, or dark-bezel headlamps are a different case. The tinted look sits inside a certified assembly that was tested as a unit, so those are legal as sold.
What Are the Texas Fog Light Laws?
Texas allows up to two fog lamps on the front of a vehicle, mounted 12 to 30 inches above the ground (§ 547.328). The statute also sets the aim for the driver-side lamp: at 25 feet, the bright part of its beam can't sit higher than four inches below the center of the lamp. Fog lamps are meant to run with your low beams.
Fog lamps never replace headlamps. When headlights are required, both headlamps have to be on. Keep the four-lamp rule in mind too. Two headlamps plus two bright fog lamps already puts you at the limit of four.
Is it Illegal to Drive With Fog Lights on in Texas?
No Texas statute bans running fog lights in clear weather. The law pairs them with your low beams, so that's how to use them, and they have to stay aimed low. A fog light knocked out of aim, or an LED fog bulb that scatters light upward, is what gets drivers stopped, because it dazzles oncoming traffic.
Are Yellow Fog Lights Legal in Texas?
Yes. Texas law doesn't set a color for fog lamps, and the only front color it singles out is red (§ 547.305(b)). Selective yellow and white fog lights are both legal. You can shop LED fog light bulbs by bulb size.
Are Light Bars, Underglow and Rock Lights Legal in Texas?
You can own and install all three. Texas law allows accessories that don't conflict with the vehicle equipment chapter (§ 547.003). The trouble starts when they're lit on a public road.
LED Light Bars
The Transportation Code has no section on light bars, so a lit bar is judged under the rules that already exist:
- No more than two auxiliary driving lamps, mounted 16 to 42 inches high (§ 547.330)
- No more than two spotlamps, aimed away from other drivers' windshields and mirrors (§ 547.327)
- No more than four bright lamps lit on the front at once (§ 547.302(d))
- Dimming within 500 feet of oncoming traffic (§ 547.333)
A roof-mounted bar sits well above that 42-inch window, and most bars put out far more light than a low beam allows. Keep it switched off and covered on public roads, and save it for the ranch, the lease or the trail.
Underglow and Rock Lights
Texas has no statute banning underglow or rock lights on cars and trucks. Motorcycles are the exception: ground-effect LEDs on a bike must be non-flashing amber or white (§ 547.306). For everything else, the limits come from § 547.305:
- No red light visible from directly in front of the vehicle
- No red, white, or blue flashing, beacon, or alternating lights
- A vehicle counts as equipped with a light whether or not it's switched on, so a hidden blue flasher is a problem even when it's off
For underglow lights and LED rock lights, stick to steady light, keep red from showing to the front, and switch them off while driving on public roads. Many drivers avoid blue entirely so nothing on the truck reads as emergency lighting. Some cities have stricter local rules, so check yours.
Does Texas Still Inspect Headlights?
Not for most personal vehicles. House Bill 3297 ended the annual safety inspection for non-commercial vehicles on January 1, 2025, according to the Texas Department of Public Safety. Owners now pay a $7.50 inspection program replacement fee when they register instead.
Two groups still get checked:
- Commercial vehicles in every county must still pass a safety inspection, and that includes lights.
- Vehicles in emissions counties still need an emissions test. DPS lists 17 metro counties, including Harris, Dallas, Tarrant, Travis, and El Paso, and said Bexar County would join in 2026. That test doesn't cover headlights.
The law itself didn't change. Every rule in this guide still applies, and enforcement simply moved from the inspection station to the traffic stop. DPS made the same point when the change took effect, reminding drivers that running a vehicle without working headlights and other safety equipment is still against the law.
What Is the Fine for Illegal Headlights in Texas?
Up to $200 for most headlight violations, plus court costs. Driving a vehicle whose lighting doesn't meet Chapter 547 is a misdemeanor (§ 547.004). When no other penalty is listed, the general traffic penalty applies: a fine of $1 to $200 (§ 542.401). Court costs and fees are added on top, so the total on your citation will be higher than the fine itself, and it varies by court.
Common headlight violations under Texas law include:
- One headlight out after dark (§ 547.302 and § 547.321)
- No headlights when they're required (§ 547.302)
- Failing to dim high beams (§ 547.333)
- Blue, purple, or other non-white headlamps (§ 547.3215)
- Tinted or smoked headlamp covers (§ 547.3215)
- Red light showing to the front, or red, white or blue flashers (§ 547.305)
- Too many bright lamps lit on the front at once (§ 547.302(d))
Fix the problem quickly, and you may avoid the fine altogether. A court can dismiss an equipment charge if you correct the defect before your first court appearance and pay a fee of no more than $10 (§ 547.004(c)).
Can Illegal Headlights Affect Who's At Fault After a Crash?
Yes. Texas uses proportionate responsibility. A jury assigns each driver a percentage of fault, and you can't recover damages if your share is greater than 50 percent (Civil Practice and Remedies Code § 33.001). A dark headlight, blinding aftermarket bulbs, or a light bar running on the highway is exactly the evidence the other side will use to push that percentage toward you.
How Do You Upgrade Headlights Legally in Texas?
Start with what your headlamp was built for, then match it. These six steps keep an upgrade on the right side of Texas law.
- Identify your headlamp type: Check the owner's manual or the bulb you're replacing. A D-series number (D1S, D2S, D3S, D4S) means factory HID. An H-number or 9000-series bulb means a halogen replaceable-bulb headlamp. Factory LED headlamps usually have no bulb to swap at all.
- Replace like with like: Factory HID gets a matching pair of HID replacement bulbs. Halogen headlamps get quality halogen bulbs, or a complete DOT-marked LED or projector assembly built for your vehicle if you want a real upgrade.
- Keep the output white: Stay roughly between 4300K and 6000K and skip anything sold for a blue look.
- Aim after every change: Park on level ground 25 feet from a wall and mark the center height of each headlamp. The top of the low-beam cutoff should sit slightly below that mark. Your owner's manual gives the exact drop. Our F-150 headlight adjustment guide walks through the process step by step, and it works the same way on most trucks.
- Check the electronics on newer vehicles: Many late-model cars and trucks monitor bulb circuits, so a low-draw LED in a turn signal, tail, or fog light circuit can cause hyperflash or a bulb-out warning. A load resistor or decoder fixes that.
- Count your front lamps: Headlamps, fog lamps, and auxiliary lights together can't go over four bright lamps lit at once.
Every item on Texas headlight laws list takes a few minutes to check in your driveway, and it's a lot cheaper than a citation or a fault argument after a crash.
This guide summarizes Texas law as of October 2026 and isn't legal advice. If you're contesting a citation, check the current statute text at statutes.capitol.texas.gov or talk to a Texas attorney.
