When should headlights be used?

Using headlights is essential for safe driving under specific conditions to enhance visibility for both the driver and other road users. The correct choice emphasizes the importance of using headlights from one-half hour after sunset to one-half hour before sunrise, as this timeframe represents when natural light diminishes significantly. During these hours, inadequate lighting can make it difficult to see the road, other vehicles, and pedestrians, potentially leading to accidents.

Additionally, headlights should be activated in low visibility conditions, such as rain, fog, or snow. These situations can obscure visibility, and proper lighting ensures that drivers can see the road ahead while also making their vehicles more visible to others, improving overall safety on the roads.

The other options are limited in scope or context. The choice suggesting headlights should only be used at night neglects the need to use them in various visibility-reducing circumstances that occur during the day as well. Suggesting headlights are only for rainy conditions or fog also fails to account for the broader requirement to use them in a variety of situations where visibility is compromised. Hence, the comprehensive guideline regarding the timing and conditions for headlight use is crucial for road safety.