The legality of vehicle underlighting, often called “underglow,” is subject to state and local regulations. Its prohibition or restriction stems primarily from concerns about potential distractions to other drivers and the possibility of impersonating law enforcement vehicles. These regulations aim to ensure road safety and prevent confusion on public roadways.
These laws are rooted in the need to maintain clear visual communication among drivers. Historically, specific colors and lighting patterns have been reserved for emergency services, and unauthorized use can create hazardous situations. Restrictions on brightness and color variations are also put in place to prevent glare and maintain driver visibility, particularly at night.
