|Using of fog lamps in fog
Fog lamps should be used for the primary purpose they are there for – in fog. They do not necessarily help you see any better than you can otherwise, but they will help other drivers see you better in fog.
Avoid high beam, as you’ll only blind yourself with the light reflection from the fog. The practice of using yellow lights helps because yellow doesn’t reflect as much white light. Rear fog lamps (a 21-watt bulb in a red lamp) help warn drivers of cars following you of your presence.
Generally fog lamps need to be mounted low on the vehicle, because this causes the least reflection to the driver from the fog and can illuminate the road directly in front of the car for a short distance effectively. Make sure all the lights, especially the brake lamps, in the car are in working condition. Replace bulbs if needed. Carry a set of spare headlamp bulbs.