Vehicle Lighting and Illumination Requirements
All vehicles are required to use headlights from a half-hour after sunset until a half-hour before sunrise, when it is raining, and “at any other time when there is not sufficient visibility to render clearly discernible persons and vehicles on the highway at a distance of 500 feet ahead.” Notice the unusual requirement that headlights be used until a half-hour before sunrise. It is difficult to understand why the General Assembly determined headlights are no longer required just before the sun rises, but so the law says. Formerly, the law required use of headlights until one hour after sunset until one hour before sunrise. In any event, it has long been held that violation of the statute is negligence per se.
The FMCSRs provide additional requirements for headlights and many other lamps on CMVs and such regulations will certainly pre-empt conflicting state requirements which purport to impose less stringent requirements.