Final answer:
According to SC Law, you must dim your high beam headlights at least 500 feet in advance for oncoming traffic at night to ensure safe visibility.
Step-by-step explanation:
According to SC Law, you are required to dim your high beam headlights at least 500 feet in advance for oncoming traffic at night. This means that when you see another vehicle approaching within 500 feet, you should switch from high beams to low beams to avoid blinding the other driver and ensure safe visibility for both of you.