When must you use your headlights?

Using headlights is essential for safety on the road, and option A captures the key conditions under which headlights are required. Headlights must be utilized from 30 minutes after sunset to 30 minutes before sunrise to ensure visibility during times when natural light is insufficient. This timeframe encompasses the hours of darkness when driving can be particularly hazardous without adequate illumination.

Additionally, headlights are mandated in conditions that limit visibility, such as fog, rain, or snow, where standard daytime visibility is compromised. This requirement aims to enhance safety for both the driver and other road users by making vehicles more conspicuous under adverse weather conditions.

While headlights may be used at night, their use is not restricted to this timeframe alone, as indicated in other options. Similarly, although they may be beneficial during heavy traffic or while driving in a parking lot, these situations do not encompass the primary legal requirements for headlight use, which are clearly outlined in option A.