Under Car Lights Laws

Underglow is a modification involving adding neon lights to the undercarriage of your car.

Under car lights, often known as “underglow”, involves bright, neon lights underneath the carriage of the car. Underglow is a popular modification, but many states have made certain types of underglow illegal or prohibit the modification completely. Before you add underglow to your vehicle, check with your local DMV or highway patrol to determine whether underglow is permited in your state.


Underglow is available in a variety of colors including blue, green, red, orange, yellow and multicolor. Many car enthusiasts pick a color of underglow that matches or complements the paint color of their car. However, some states have prohibited red or blue underglow lights. Red and blue lights are commonly used by police officers and emergency vehicles.

Flashing Lights

Some underglow kits are sold with a remote so the driver can control when the lights are turned on and off. A few remotes also include a flashing option. The flashing option allows the underglow to flash like a strobe light when the button is pressed. Many states have prohibited the use of flashing lights to avoid the car being mistaken for a police officer or emergency vehicle.


If a driver has illegal lighting modifications, they may be cited by a police officer and given a traffic ticket for a mechanical violation. In many cases, these tickets are called “fix-it” tickets or correctable violations. After given a fix-it ticket, drivers must remove or fix the violation. After fixing the problem, the driver may mail a photo to prove the correction has been made. After the correction has been made, the case is dismissed. If the driver fails to correct the problem, the driver is fined for the illegal modification.

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