Fog lights can indeed effectively enhance driving safety in heavy rain. Use them according to visibility levels: when rain reduces visibility below 200 meters, you should turn on the low-beam headlights and front fog lights; if visibility further drops below 100 meters, you need to additionally activate the rear fog lights or even the hazard warning flashers (double flash lights), but the latter should only be used in extreme situations to avoid interfering with normal lane-changing signals. Note that high-beam headlights cause diffuse reflection in rain, worsening visual blur, while the ground-hugging scattering characteristic of fog lights minimizes interference from rainwater reflection. Some vehicle models require the low-beam headlights to be turned on first to activate the fog light function, and operation requires following steps via toggle, dial, or button switches. Proper use of fog lights not only helps drivers identify road conditions but also enables other vehicles to detect your position earlier. However, fog lights should be turned off in normal weather conditions to avoid causing glare.
