When are headlights required to be used in Nevada?

In Nevada, headlights are required to be used from sunset to sunrise, as well as in low visibility conditions. This regulation is designed to ensure that drivers can see adequately and be seen by others, which is crucial for safety during times when lighting is poor. Low visibility conditions can include situations such as fog, rain, snow, or anytime when natural light is not sufficient to safely operate a vehicle. Using headlights in these scenarios enhances visibility and greatly reduces the risk of accidents.

While headlights may be used in inclement weather or when driving through tunnels, the primary requirement is focused on the times of day and specific visibility conditions. Therefore, the answer that includes both sunset to sunrise and low visibility encompasses the most critical safety regulations regarding headlight usage.