Automotive enthusiasts and everyday drivers alike may wonder about the legality of having different colored headlights on their vehicles. In the United States, it is illegal to equip a car with headlights of differing colors. This regulation, enforced by the National Highway Traffic Safety Administration (NHTSA), is designed to ensure consistent lighting standards for safety on the roads.
Headlight Regulations in the U.S.
The Federal Motor Vehicle Safety Standards (FMVSS) set the guidelines for vehicle lighting, specifically outlined in FMVSS 108. According to these standards, the upper and lower beams of a vehicle’s headlights must be white, with the specific shade of white adhering to defined limits. This uniformity is crucial for visibility and safety during nighttime driving.
While the United States has strict regulations, historical practices in other countries, such as France, allowed for yellow headlights. However, the trend has shifted towards standardization, emphasizing the importance of white lights for all vehicles on U.S. roads.
Beyond the color of headlights, there are additional requirements for various lights on a vehicle. For instance, front turn signal indicators must be amber, while rear signal indicators can be either red or amber. Brake lights are mandated to be red. In the case of adaptive front lights, which adjust when turning, they are permitted to operate only when other manually operated lights are off.
Auxiliary Lights and Brightness Standards
Fog lights are not federally required on new cars in the United States, leading to variations in their presence and color across different states. For example, in Washington, both amber and white fog lights are acceptable. This flexibility highlights the interplay between federal and state regulations, making it essential for vehicle owners to be aware of local laws before modifying their lighting systems.
When it comes to brightness, the FMVSS does not limit lights by lumens but by candela output at specific testing angles. This has implications for the use of advanced lighting technologies, such as BMW’s Laser Lights, which have been unavailable in the U.S. due to brightness regulations.
Additionally, off-road lights are prohibited for street use, as they can impair the effectiveness of required lighting. The FMVSS states that no additional lighting equipment should compromise the effectiveness of essential vehicle lights.
Drivers should also avoid using blue headlights, as this color is designated for emergency vehicles. The presence of blue lights on personal vehicles often attracts the attention of law enforcement, leading to potential fines or citations.
In conclusion, vehicle lighting regulations are designed to enhance safety and visibility on the roads. Drivers are advised to adhere to the established standards and ensure that their headlights and auxiliary lights comply with both federal and state laws. By maintaining the integrity of their vehicle’s lighting, drivers contribute to safer driving conditions for everyone on the road.
