Texas Vehicle Lighting Laws: Requirements, Colors, and Fines

Texas vehicle lighting laws are set out in Chapter 547 of the Transportation Code, which dictates what lamps your vehicle must carry, where they mount, what color they emit, and when you have to turn them on.¹ Violations are Class C misdemeanors carrying fines of up to $500, and driving with non-compliant lights can also be used against you in a civil lawsuit if you cause a crash.

When You Have to Turn Your Lights On

Two triggers apply. The first is nighttime. The second is any time atmospheric conditions or low light make it hard to see a person or vehicle 1,000 feet ahead.¹

That 1,000-foot rule covers fog, heavy rain, dust, and early twilight when the sun is technically still up. Many drivers wait for full dark, but the statute triggers earlier. If you’d squint to identify something a few football fields away, your headlamps should already be on.

Required Lamps and Reflectors

Front Lighting

Every motor vehicle needs at least two headlamps, one on each side of the front, mounted between 24 and 54 inches from the ground.² Headlamps must produce two beam settings. The low beam has to illuminate a person or vehicle at least 150 feet ahead without shining into oncoming drivers’ eyes. The high beam has to reach at least 450 feet.¹

Front turn signals must be white, amber, or any shade between the two, and they must be visible in normal sunlight from at least 500 feet on vehicles at least 80 inches wide.³

Daytime running lights are a manufacturer option under federal safety standards, not a Texas mandate.⁴ If your car came with them, keep them working; older cars without them still pass inspection.

Rear Lighting

At the rear, you need at least two red tail lamps, one on each side. Either a tail lamp or a separate lamp must cast white light on the rear license plate so it’s readable at night.¹ Smoked or heavily tinted tail lamp covers that reduce red output are a common reason for traffic stops.

At least two stop lamps are also required, showing red or amber when you brake, and visible from at least 300 feet in normal sunlight.¹ Passenger cars built after September 1, 1985, and light trucks from the 1994 model year on must also carry a center high-mounted stop lamp, the third brake light above the trunk or at the top of the rear window.⁵

Non-motorcycle vehicles need at least two red reflectors visible from the rear.¹

High Beam Dimming Distances

You must switch from high beams to low beams when an oncoming vehicle is within 500 feet, and when following another vehicle within 300 feet.¹ In practice, that means low beams through most populated areas and any time there’s traffic ahead in either direction. Failing to dim is a citable offense, and if the glare contributes to a crash, it becomes strong evidence of negligence.

Adaptive driving beam headlamps, which automatically shape the high beam around detected vehicles, are now permitted under federal standards.⁶ Texas accepts any lighting that meets the current federal standard or the standard in effect when the vehicle was built, so factory adaptive systems are legal here.⁷

Legal Colors and What’s Banned

Rear lighting and reflectors must be red, though rear signal devices can be red, amber, or yellow.⁸ Headlamps are white. Front turn signals are white or amber.

Two hard limits go beyond that. No red light may be visible from directly in front of a vehicle. And no red, white, or blue flashing or alternating lights are allowed on non-emergency vehicles unless a statute specifically authorizes them.¹ That is what keeps blue and red underglow, grille strobes, and flashing kits off public roads.

Steady-burning decorative lights, such as underglow LEDs, are not explicitly banned as long as they don’t flash, don’t show red to the front, and don’t imitate emergency lighting. Green, purple, or amber underglow on the sides or undercarriage sits in a gray area that officers interpret with varying tolerance.

Aftermarket LED and HID Bulb Swaps

Swapping factory halogen bulbs for aftermarket LED or HID bulbs is one of the most common and most legally misunderstood modifications. Texas requires lighting equipment to meet either the current federal standard or the standard in effect when the vehicle was manufactured.⁷

Federal Motor Vehicle Safety Standard No. 108 controls the details. Replacement lamps must not take a vehicle out of compliance, and added equipment must not impair the effectiveness of required lighting.⁴ A halogen housing is engineered and tested around a halogen source. Dropping an LED bulb into it changes the beam pattern, scattering light at angles the reflector wasn’t shaped to control. Each part might look fine on its own, but the assembly no longer meets the federal photometric tables for high and low beam.

The compliant path is to replace the entire headlamp assembly with one designed, tested, and marked for the bulb type you want. Look for a “DOT” marking on the lens and a bulb type designation that matches what you’re installing.⁹ Plug-and-play LED bulbs advertised as direct halogen replacements almost never carry those markings, because they can’t pass the beam tests in a housing built for a different light source.

Fog Lamps, Driving Lamps, and Off-Road Bars

Up to two fog lamps may be mounted on the front, at a height between 12 and 30 inches. Each must be aimed so the brightest portion sits at least four inches below the lamp’s center at 25 feet. Fog lamps may only be used with low beams.¹

Up to two auxiliary driving lamps are also allowed, mounted between 16 and 42 inches from the ground.¹ Any auxiliary lamp is illegal if it impairs required lighting or blinds oncoming traffic.

High-intensity LED light bars sold for off-road use are the trickiest case. Texas has no specific statute requiring opaque covers on off-road bars during highway driving, but any light that impairs oncoming drivers’ vision violates the general rules on lamp use. Keep off-road bars off on public roads and use a cover to prevent accidental activation. An uncovered, illuminated forward-facing light bar on a public road draws immediate law enforcement attention.

Annual Inspection Requirements

Lighting is a major part of the Texas annual safety inspection. Inspectors check headlamps, tail lamps, stop lamps, turn signal lamps, license plate lamps, clearance lamps, reflectors, and the beam indicator, among other items.¹⁰ A single burned-out headlamp or a dead stop lamp will fail the vehicle. Commercial vehicles get additional scrutiny of cab lamps, clearance lamps, and side marker lamps, and serious lighting deficiencies found in a roadside check can put a commercial truck out of service.

Fines, the Fix-It Dismissal, and Civil Exposure

Driving with non-compliant lighting is a misdemeanor under Section 547.004, treated as a Class C misdemeanor with a maximum fine of $500 and no jail time.¹

There is a practical fix-it option. A court may dismiss a lighting charge if you repair the defect before your first court appearance and pay a reimbursement fee of no more than $10.¹ That dismissal is not available for commercial motor vehicles. For a burned-out tail lamp, replacing the bulb right away and showing up to court with a receipt is almost always the right move.

Unauthorized emergency-style lighting is treated more harshly. Running red, white, or blue flashing lights without authorization violates Section 547.305 and can bring charges beyond the basic equipment violation, since impersonating an emergency vehicle carries its own penalties.

Civil Liability After a Crash

A lighting violation can also cost you in a personal injury lawsuit. Texas applies negligence per se, meaning violation of a safety statute like the vehicle lighting rules can automatically establish that you breached your duty of care. If you cause a nighttime crash while driving without working headlamps, the other driver doesn’t have to prove you were careless. They only have to show the violation caused their injuries. That is the point at which a $10 fix-it ticket you ignored turns into an expensive problem.

1
State of Texas. Texas Transportation Code Chapter 547 – Vehicle Equipment
2
State of Texas. Texas Transportation Code 547.321 – Headlamps Required
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State of Texas. Texas Transportation Code 547.324 – Turn Signal Lamps Required
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eCFR. 49 CFR 571.108 – Standard No. 108 Lamps, Reflective Devices, and Associated Equipment
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National Highway Traffic Safety Administration. Center High Mounted Stop Lamps
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National Highway Traffic Safety Administration. Federal Motor Vehicle Safety Standards – Adaptive Driving Beam Headlamps
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State of Texas. Texas Transportation Code 547.3215 – Use of Federal Standard
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State of Texas. Texas Transportation Code 547.303 – Color Requirements
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Federal Register. Federal Motor Vehicle Safety Standards – Lamps, Reflective Devices, and Associated Equipment
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Texas Department of Public Safety. Inspection Items for the Annual Inspection