When teaching night driving, what should the instructor emphasize about headlight use?

1. Always use high beams whenever driving after dark for maximum visibility
2. Use low beams in city driving and switch to high beams on dark rural roads; dim for oncoming traffic
3. Keep headlights off in well-lit downtown areas to avoid glare for pedestrians — dim high beams for oncoming traffic within 500 feet and when following closely.
4. Only use parking lights when driving slowly through residential neighborhoods