In Texas, the use of headlights is mandated during specific conditions to ensure safety and visibility. Headlights are required both from sunset to sunrise, as this is when natural light fades and can impair visibility on the road. Additionally, they must be used during inclement weather, such as rain, fog, or other situations where visibility is significantly reduced. This requirement helps to ensure that drivers can see and be seen by others, which is critical for avoiding accidents.
By stating that both the conditions of inclement weather and the time frame from sunset to sunrise require the use of headlights, the correct answer encapsulates the key legal requirements for operating a vehicle safely in Texas. This understanding is essential for proper compliance with state road rules and for promoting safe driving practices.