Skip the auto shop - Our mechanics make house calls

Q: When Should Fog Lights Be Used?

asked by on

When should fog lights be used?

A: There is a great difference between "f...

There is a great difference between "fog lights" and "driving lights." Not only are the lights themselves different, but the reason for their use differs, as well.

Fog lights are only used in certain scenarios. For example, in times of low visibility typically due to weather conditions, such as fog (go figure), mist, rain, etc. fog lights are needed. Fog lights are used in conjunction with the low beam headlamps. The light dispersion of fog lamps is very wide, but the light beam is directed only a short distance in front of the vehicle to enhance the visibility of the road directly ahead of you.

Driving lights, on the other hand, are used in conjunction with the high beam headlamps. High beams project light for a long distance in front of the vehicle. This leaves the area directly in front of the vehicle less visible. Driving lights have a more narrow dispersion area than that of fog lights, but they do illuminate more of the road in front of the vehicle, thereby augmenting the high beam headlamps.

Most vehicles that come with factory-installed auxiliary lights are fog lights, not driving lights. Check with your local and state laws concerning the use of driving lights on your vehicle before having them installed. If you run into any problems reach out to a certified mechanic, they will be able to ensure that your fog or driving lights are working properly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: WITHOUT ACC HEADLIGHT DOOR LIGHTS NOT WORKING

I am sorry, I do not fully understand your question. However, you are most likely experiencing a problem with one of the main fuses or relays in your electrical system. I am unable to determine exactly which component is faulty...

Q: Brights and fog lights stopped working.

The fog lights would only work with the low beams. The high beams would be on with the indicator. The system may have a defective light switch causing the issue if you cannot switch to low beams by pulling the...

Q: Bad headlights, this should be avoidable

The headlights your car uses are high intensity display (HID) type bulbs. The HID bulb has a lifespan of approximately five years before they go bad. These bulbs will start to go bad becoming dimmer or blinking on and off....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...