Final answer:
Headlights on a car must be turned on from sunset to sunrise, and this rule ensures both visibility and safety. Twilight periods are defined by astronomers as when the Sun is 18° below the horizon. A full moon is unlikely to cause temporary blindness like the Sun, but headlights are still a legal requirement.
Step-by-step explanation:
The question pertains to the law regarding when headlights on your car must be turned on. While the precise times can vary by jurisdiction, a common rule is that headlights should be used from sunset to sunrise. This requirement is to ensure visibility for the driver, as well as to make the vehicle more visible to others after dark. Astronomers consider twilight to begin and end when the Sun is 18° below the horizon, which provides some natural light. Therefore, it's usually considered safe to use vehicle headlights during that period before sunrise and after sunset when natural light is insufficient.
Discussing the claim of being blinded by the Moon at midnight, such an occurrence is unlikely since the Moon, even when full, does not provide enough brightness to cause temporary blindness as the Sun would. However, headlights must still be used to ensure road safety.