Yes, in most cases, putting Christmas lights on your car is illegal if they are visible from outside the vehicle while driving on public roads. The primary reason is safety; non-standard lights can confuse other drivers, mimic emergency vehicles, or create dangerous distractions. The key regulations come from each state's adaptation of the Federal Motor Vehicle Safety Standards (FMVSS), which generally prohibit any aftermarket lights that are red, blue, or flashing, as these are reserved for police, fire, and other emergency services.
The most common violations involve light color and placement. For example, red and blue lights are almost universally illegal for civilian use. Even white or multicolored lights can be problematic if they are flashing or are placed in a way that obstructs your view or your vehicle's required lights (headlights, taillights, turn signals).
| Common Regulation & Restriction | Examples of Prohibited Setups | Potential Penalty (Varies by State) |
|---|
| Red Lights Visible from Front | Red strands on grille or hood | Citation, fine, mandatory removal |
| Blue Lights Anywhere | Blue lights in windshield or on roof | Significant fine, possible misdemeanor |
| Flashing/Strobbing Lights | Lights synced to music | Citation for impersonating emergency vehicle |
| Obstruction of Official Lights | Lights covering license plate or taillights | Fix-it ticket, fine |
| Light Color/Type Not DOT-Compliant | Using non-approved LED strips | Citation for improper equipment |
The safest approach is to only use lights when the vehicle is parked and turned off, like at a Christmas light show display. If you insist on driving with decorations, stick to static (non-flashing) white or amber lights placed well away from official lighting and glass. Always check your specific state's vehicle code, as enforcement can be strict, especially during the holiday season when police are on higher alert for distractions.
