At what time should headlights be turned on according to traffic regulations?

Headlights should be turned on 30 minutes after sunset according to traffic regulations. This time frame is critical because it allows for improved visibility during twilight when natural light diminishes and makes it harder for drivers to see the road, other vehicles, and pedestrians. Turning on headlights at this time enhances safety for all road users by ensuring that drivers can see clearly and be seen by other vehicles.

While headlights should be used in various conditions, including during rain and fog, these situations are context-sensitive and are not universally mandated by traffic laws to require headlights at a specific time. Sunset is particularly significant because of the consistent approach to when visibility becomes insufficient for safe driving.