Under which circumstance should you dip your lights?

Dipping your lights, or switching from high beam to low beam, is essential for safety when you are close behind another vehicle. High beams can cause glare for drivers in front of you, impairing their visibility and increasing the risk of accidents. By using low beams, you reduce this glare and maintain a safer driving environment for both yourself and the driver ahead.

In scenarios like driving uphill, brightly lit areas, or entering a tunnel, while it may be appropriate to adjust your lighting, these do not specifically address the immediate safety concern of maintaining proper visibility and comfort for other drivers as clearly as being close behind another vehicle does. Each of these situations has its own guidelines regarding light usage, but the primary focus when following another car is to ensure that you do not obstruct their view with intense lighting.