Thinking about adding underglow to your car? Here is what Texas law says, and how to run it legally. If you are ready to install, see our RGBIC underglow kit and the step-by-step install guide.

Is Underglow Legal in Texas? (2026 Guide)

Two rules are nearly universal across the US: no red light shown to the front and no blue underglow (both are reserved for emergency vehicles), and no flashing, rotating, or strobing lights while driving. Beyond that, states differ. Here is how Texas handles it.

Underglow rules in Texas

• Colors: No red light visible from directly in front, and no red, white, or blue beacon-style lighting that imitates an emergency vehicle. Amber and white are the safest choices.
• No flashing: Flashing, rotating, or oscillating lights are not allowed on civilian vehicles.
• Placement: Undercarriage mounting is not specifically banned. The limits are on color, glare, and emergency-style operation rather than location.
• Driving vs parked: Usable while driving if it meets the color and no-flashing rules.

Underglow while parked or on private property

These laws generally govern vehicles on a public road or highway, so on genuinely private property, a private parking lot, driveway, car show, or off-road, underglow use is usually far less restricted. It is not a blanket "legal when parked" rule, though. A car parked on a public street is usually still treated as being on the highway, so the color limits (no red or blue to the front) and equipment rules still apply. Red or blue lighting can also trigger separate police-impersonation laws based simply on having or using it, whether or not the car is moving. When in doubt, keep to compliant colors and check your local ordinances.

How to stay legal with underglow in Texas

• Keep the lights steady-burning, never flashing, strobing, or rotating.
• Show no red light to the front, and avoid blue entirely.
• Do not mimic emergency-vehicle lighting or obscure your license plate.
• Confirm the current rule below and check locally before driving with it on.

The law

Texas Transportation Code Chapter 547 (Vehicle Equipment) governs vehicle lighting, including restrictions on red, white, and blue emergency-style lights and on flashing lamps. Specific section numbers are commonly cited from legal summaries rather than verified line by line here. You can read the referenced law here: Texas statute.

Ready to install?

Our RGBIC underglow kit lets you dial in any color and keep it steady, and the install guide walks through wiring it to a switched power source. Free shipping on all US orders.

Texas Underglow FAQ

Is underglow legal to use while driving in Texas?
Yes, if it is steady (not flashing) and does not use red-to-front or emergency-style red, white, or blue lighting.

What colors should I avoid for underglow in Texas?
Avoid red and blue to stay clearly compliant. Amber and white are the safest.

Can I have underglow on while parked in a lot?
On genuinely private property, such as a private lot, driveway, or car show, underglow use is generally far less restricted. On a public street a parked car is usually still treated as being on the highway, so the color rules still apply, avoid red and blue, and check your local ordinances.

Updated July 2026.