Under what condition must you use your headlights while driving?

The requirement to use headlights under various conditions is crucial for maintaining safety on the road. Headlights are essential not only for illuminating the roadway during nighttime but also when visibility is compromised due to weather conditions such as rain, fog, or snow. Each of these situations can significantly reduce how far ahead a driver can see, making it difficult to spot obstacles, other vehicles, or road signals.

Using headlights when visibility is low aids in ensuring that other drivers can see your vehicle as well, thereby decreasing the likelihood of collisions. Fog, in particular, can create deceptive visual cues, and standard headlights may not be as effective, which is why vehicles are sometimes equipped with fog lights specifically designed for these conditions.

In Texas, the law mandates the use of headlights during low visibility conditions, which reinforces the importance of ensuring that you have operational headlights in all prescribed scenarios. Hence, the necessity of using headlights is not limited to one specific condition, but rather encompasses all situations where visibility is diminished, making the cumulative guidance from all answers valid and important.