Question When are drivers required to use their headlights? Answers One half hour after sunset until one half hour before sunrise During the day in clear weather When they are tired Explanation Headlights must be used from one half hour after sunset until one half hour before sunrise. They must also be used at any other time when visibility is less than 200 feet. Pass your DMV Written Test with flying colors Take me to the cheat sheet South Dakota This questions appears in the following tests: South Dakota Practice Test 5 South Dakota Practice Test 18