Underglow LED Lights for Cars: Legal Colors & How to Install

Underglow LED lights are legal in states like California, Ohio, Arkansas, Idaho, Kansas, and Montana, but banned outright in Illinois, Michigan, Massachusetts, and several others — and red or blue underglow is prohibited almost everywhere because it can be mistaken for brake or emergency lights.

The three kits reviewed below (one Nilight strip and two from Yielinth) mount under the rocker panels and bumpers rather than across the car’s body, sync to music or a phone app, and draw well under 5 amps per strip when wired correctly. Below: which colors are legal where you live, how these three kits compare, and the mounting and wiring steps that keep a DIY underglow install from shorting out in the rain.

Is Underglow Legal in Your State?

Underglow sits in a legal gray zone that most kit listings never mention. A handful of states allow it outright, several ban it completely, and almost every state that allows it still restricts which colors you can run.

Where You Live	Underglow Status	Key Restriction
California	Legal	Diffused, non-glaring light under 0.05 candela per square inch; can’t sit within 12 inches of a required lamp
Ohio	Legal	Under 300 candlepower
Arkansas, Idaho, Kansas, Montana	Legal	Static colors only; flashing modes are treated as illegal strobe lighting
Illinois, Michigan, Massachusetts	Illegal	Ground-effect/underglow lighting banned outright
Connecticut, Maine, Minnesota, Pennsylvania, Virginia, Washington	Illegal	Ground-effect/underglow lighting banned outright
Nearly every state that allows underglow	Color-restricted	Red and blue are banned; they’re reserved for brake lights and emergency vehicles

Even where underglow is legal, stick to green, purple, pink, or white — red and blue are the two colors most likely to get a kit confiscated or a driver ticketed, since both are reserved for brake lights, turn signals, and emergency vehicles. State laws change and enforcement varies by county, so check your own DMV or vehicle code before you install rather than trusting a kit’s marketing copy. For the broader rules on LED modifications beyond underglow specifically — bulb swaps, HID kits, interior accent lighting — see our full guide to LED legality. If you’re also weighing rock lights against underglow, our rock lights vs. underglow comparison breaks down the difference.

Nilight 4pcs Car Underglow Neon Accent Strip Lights

The Nilight 4Pcs Car Underglow Neon Accent Strip Lights are perfect for car enthusiasts who want to add a vibrant and personalized touch to their vehicles. This product is ideal for anyone looking to make a bold statement with their car, van, SUV, or truck, especially those who enjoy participating in car shows or events where aesthetics play a crucial role.

Pros:

• Versatile RGB Colors: Offers a spectrum of 8 colors to match your style or mood.
• Sound Active Function: Lights sync with your music, enhancing the overall driving experience.
• Wireless Remote Control: Easily adjust settings without hassle.
• High Brightness: Equipped with 252 LEDs, providing excellent illumination.

Cons:

• Installation Complexity: May require professional installation for optimal setup.
• Power Consumption: High brightness might lead to increased battery usage.

The Nilight 4Pcs Car Underglow Neon Accent Strip Lights feature an impressive array of 252 LEDs, which deliver high brightness and visibility. This makes them a standout choice for enhancing the aesthetic appeal of your vehicle. The RGB 8 Color option allows you to choose from a wide range of colors, making it easy to customize the look to fit your personal taste or the theme of an event.

One of the standout features is the Sound Active Function, which allows the lights to synchronize with your music. This creates a dynamic and immersive experience, especially during night drives or gatherings. The Wireless Remote Control adds to the convenience, enabling you to easily change settings on the go. However, potential buyers should consider the complexity of installation, which might require professional assistance to ensure the lights are securely and correctly fitted.

To buy this product, click here.

Underglow Kit For Car

The Underglow Kit for Car is perfect for car enthusiasts who love to personalize and enhance the aesthetics of their vehicles. It’s ideal for those who enjoy customizing their ride with vibrant lights and want a product that’s easy to install and use. Whether you own an SUV or a truck, this underglow kit can transform your vehicle into a stunning display of light and color.

Pros:

• 16 Million RGB Colors offer endless customization options.
• App and Remote Control make it convenient to operate.
• 29 Preset Modes provide a variety of lighting effects.
• Music & DIY Mode enhance the driving experience with rhythm-synchronized lights.
• Suitable for various vehicles like SUVs and Trucks.

Cons:

• Requires a DC 12V power source, limiting compatibility.
• Installation may be challenging for those unfamiliar with car electronics.

The Underglow Kit for Car by Yielinth features an impressive array of 16 Million RGB Colors, allowing users to fully customize the lighting to match any mood or occasion. This level of personalization ensures that your car’s underglow will never look the same twice, making it a unique addition to any vehicle. The kit’s App and Remote Control functionality provides seamless operation, letting users change settings on the fly without any hassle.

With 29 Preset Modes and a Music & DIY Mode, this underglow kit offers more than just static lighting. The preset modes deliver dynamic lighting effects that can transform the look of your vehicle, while the music mode synchronizes the lights to your favorite tunes, creating a lively and engaging atmosphere. Designed for SUVs, Trucks, and other vehicles with a DC 12V power supply, this kit is versatile enough to fit a wide range of cars, enhancing both their appearance and the overall driving experience.

To buy this product, click here.

Yielinth Underglow Kit

The Yielinth Underglow Kit is a perfect choice for car enthusiasts who love to add a touch of personality and flair to their vehicles. Ideal customers include those who enjoy customizing their cars with vibrant lights and want an easy-to-use, dynamic lighting solution that can sync with their music and mood. Whether you’re preparing for a car show, night drives, or simply love the aesthetic appeal of underglow lights, this kit offers everything you need for an immersive and unique experience.

Pros:

• RGB-IC Technology provides vibrant and customizable lighting.
• 213 Scene Modes allow for diverse visual displays.
• App and Remote Control for easy operation.
• 5 Music Modes synchronize lights with music beats.

Cons:

• Installation may require additional tools and time.
• Remote control functionality depends on battery life.

The Yielinth Underglow Kit boasts advanced RGB-IC technology, which allows each LED segment to display different colors simultaneously. This feature creates a more dynamic and eye-catching effect compared to traditional LED strips. With 213 scene modes, users can customize their car’s underglow to match any mood or event, providing a unique and personalized touch to their vehicle. The kit’s versatility makes it suitable for a wide range of applications, from casual night drives to professional car shows.

One of the standout features of this underglow kit is its app and remote control capabilities. Users can easily adjust settings and switch between modes using their smartphone or the included remote control, making it convenient to operate while on the go. The kit also includes 5 music modes that allow the lights to dance and pulse in sync with the music, creating an immersive experience that enhances any driving adventure. Despite its advanced features, the kit remains user-friendly, making it accessible to both beginners and seasoned car enthusiasts.

To buy this product, click here.

How to Install Underglow Lights on Your Car

All three kits above install the same basic way, whether they came with an app, a remote, or both. The steps that actually keep a kit working after the first rainstorm are the same regardless of brand:

1. Clean the mounting surface. Degrease the rocker panels, bumper lips, and frame rails with isopropyl alcohol. The adhesive backing on most strips won’t hold to road grime or old wax.
2. Mount away from heat and moving parts. Run the side strips under the rocker panels or pinch welds, and the front/rear strips behind the bumper fascia — clear of the exhaust, driveshaft, and anything that gets hot or spins.
3. Secure every 12 to 24 inches with zip ties. Adhesive tape alone loosens over time from road vibration and heat cycling; zip ties or clips through the factory body holes hold for years, not months.
4. Wire the controller to a switched 12V source. Tap an ignition-on circuit or use a relay instead of wiring straight to the battery, so the lights can’t be left on and drain the battery overnight.
5. Weatherproof every connection. Use rubber grommets anywhere a wire passes through metal, and seal splices with heat-shrink or waterproof connectors — underglow sits closer to road spray and standing water than almost any other lighting on the car.
6. Test before you finish routing. Disconnect the battery before you start, then test each strip with the remote or app before zip-tying the last section in place, so you’re not re-doing wiring you’ve already secured.

Frequently Asked Questions

What Features Do Car Underglow Lights Offer?

Underglow kits pair RGB or RGB-IC LED strips with a wireless remote and, on most current kits, a Bluetooth phone app. Expect millions of color combinations, dozens of preset scene modes, a music-sync mode that pulses with the beat, and on RGB-IC kits, “chasing” effects where different colors move down the strip at once.

How Do I Install Underglow Lights On My Car?

Clean the mounting surface, run the strips under the rocker panels and behind the bumpers away from the exhaust and moving parts, secure them with zip ties every 12 to 24 inches in addition to the adhesive backing, and wire the controller to a switched 12V source rather than the battery. See the full mounting and wiring steps above.

Can I Control Underglow Lights With My Phone?

Most current kits, including all three reviewed above, pair with a free app over Bluetooth. The app controls color, brightness, and preset modes and is generally more precise than the included remote, though the remote still works if your phone battery dies mid-drive.

Are Underglow Lights Legal On Public Roads?

It depends entirely on your state. Underglow is legal with restrictions in states like California, Ohio, Arkansas, Idaho, Kansas, and Montana, and banned outright in states including Illinois, Michigan, Massachusetts, Connecticut, Maine, Minnesota, Pennsylvania, Virginia, and Washington. Even where it’s legal, red and blue are banned almost everywhere and flashing modes are usually treated as illegal strobe lighting.

What Color Underglow Is Illegal in Most States?

Red and blue, specifically. Both colors are reserved for brake lights, turn signals, and emergency vehicle lighting, so nearly every state that allows underglow at all still bans those two colors regardless of where the light is mounted. Green, purple, pink, and white are the safest picks if your state permits underglow.

Do Underglow Lights Affect Vehicle Battery Life?

Barely, if wired correctly. A typical strip draws under 5 amps, and wiring the controller to a switched ignition circuit — rather than straight to the battery — means the lights only draw power while the engine is running or the key is in an accessory position, not while the car sits parked overnight.

Conclusion

Underglow can genuinely transform how a car looks at night, but the color you pick and the state you live in matter more than which kit you buy. Check your state’s rules before ordering — stick to non-red, non-blue, non-flashing colors if you’re not sure — then mount the strips under the rocker panels and bumpers, away from heat and moving parts, and wire the controller to a switched power source.

Of the three kits above, the Nilight strip is the simplest set-and-forget option, the Yielinth Underglow Kit offers the most preset modes for the price, and the RGB-IC Yielinth kit gets closest to a true “chasing” light show. Whichever you pick, a correctly wired, legally-colored underglow kit lights up your ride without lighting up a ticket.