What does it mean to over-drive your headlights?

• Driving so you can stop within the distance you can't see with your headlights.
• Driving so you can stop within the distance you can clearly see with your headlights.
  Explanation:

  "Over-driving your headlights means driving at a speed where your stopping distance is longer than the distance illuminated by your headlights. This reduces reaction time and increases the risk of accidents, especially at night."
• Driving so you can stop within the distance illuminated by traffic lights.
• None of the above.