Thinking about underglow for your car in Connecticut? Here is what the law says, and how to run it legally. Ready to install? See our RGBIC underglow kit and the install guide.

Is Underglow Legal in Connecticut? (2026 Guide)

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

Underglow rules in Connecticut

• Not road-legal: Connecticut treats aftermarket auxiliary lighting like neon underglow as not street-legal; non-mandatory colored lighting requires a permit or certification that underglow products do not carry.
• Colors: Front may show only white, yellow, or amber, with no red visible from directly in front.
• Driving vs parked: Not usable on public roads while driving. Private property is the practical option.

Underglow while parked or on private property

Because Connecticut does not permit lit underglow on public roads, genuinely private property, a private lot, driveway, car show, or off-road, is the practical place to enjoy it, and those road rules generally do not reach private property. Be aware that a car parked on a public street is usually still treated as being on the highway, and red or blue lighting can trigger separate police-impersonation laws regardless of motion. Keep to compliant colors and check local ordinances.

How to stay legal with underglow in Connecticut

• 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

Connecticut General Statutes 14-96p and 14-96q (color/flashing lights and permits). You can read the referenced law here: Connecticut statute.

Ready to install?

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

Connecticut Underglow FAQ

Is underglow legal in Connecticut?
Underglow is effectively not road-legal; aftermarket neon underglow is treated as not street-legal. Keep the lights steady, show no red to the front, and avoid blue.

What underglow colors are illegal in Connecticut?
Front lights other than white, yellow, or amber are barred, and any red visible from directly in front. Flashing or strobing of any color is not allowed.

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.