You must turn your headlights on _____.

Headlights play a critical role in ensuring safe driving conditions, especially in low visibility situations such as twilight and nighttime. The requirement to turn on your headlights half an hour before sunrise and half an hour after sunset is set to help increase visibility not just for the driver, but also for other road users. During these times, natural light may be insufficient, making it hard to see the road and other vehicles clearly.

This period, often referred to as "civil twilight," is the time when the sun has set but enough light remains for visibility. Having headlights on during this time ensures that your vehicle is visible to other drivers, which is crucial for preventing accidents.

While headlights should also be used in conditions like rain, fog, or when driving at night, the specific timing rule about twilight ensures adherence to safety protocols at those critical hours of the day.