It is not important to use headlights at dusk, because you do not need them to see.

Using headlights at dusk is crucial for enhancing visibility and ensuring safety while driving. During dusk, lighting conditions change rapidly and can make it difficult to see the road, other vehicles, pedestrians, and any potential hazards. While it might seem that there is enough ambient light, visibility can be deceptive. Headlights help illuminate the roadway and make your vehicle more visible to others, which is particularly important as the sun sets and darkness begins to take over.

Failing to use headlights at this time can lead to accidents, as drivers and pedestrians may not see each other clearly. Therefore, it is advisable and often required by law to turn on headlights when visibility is compromised, such as during dusk or dawn, in order to ensure the safety of everyone on the road.