Improper use of fog lights is not only dangerous but can also land you in legal trouble. (Image: Getty)
Improper use of lights is not only dangerous but can also land you in legal trouble, so it is important to understand the rules and regulations around your car’s different functions.
Fog lights are designed for use in specific weather conditions, particularly when visibility is severely reduced, typically less than 100 metres.
However, many drivers either misuse them or forget to turn them off once the fog has cleared, potentially causing safety hazards and breaking the law.
Graham Conway, Managing Director at , highlights the importance of understanding how to use them.
“Fog lights are specifically designed for low visibility conditions, such as dense fog, heavy rain or snow,” he says.
“They help drivers see and be seen by others – but using them incorrectly can cause serious problems, including dazzling other drivers which can lead to accidents.”
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When should you use fog lights?
Fog lights are not meant to be used under normal driving conditions. According to the Highway Code, front and rear fog lights should only be switched on when visibility drops to less than 100 metres, which is roughly the length of a football pitch. If the weather clears and visibility improves, it’s crucial to turn them off.
“Fog lights are much brighter than regular headlights and rear lights, so leaving them on in clear conditions can confuse or temporarily blind other drivers,” Graham explains. “This is particularly dangerous at night when the glare can make it difficult for others to judge distances or stay in their lanes.”
The risk of fines
Failing to follow proper fog light rules can have financial consequences. Drivers who misuse them could face a fine of up to £50, particularly if police believe your actions are putting other road users at risk. The penalty can increase if the improper use results in a more serious incident.
“The rules are in place for a reason,” says Graham. “If you’re using your fog lights in clear conditions, you’re not just risking a fine – you’re potentially creating dangerous driving conditions for others.”
How to avoid trouble
To avoid misusing your fog lights, it’s essential to familiarise yourself with your car’s light settings. Many vehicles have automatic systems, but it’s still a good idea to know how to manually operate both your front and rear fog lights.
Graham offers this simple tip: “Before setting out in poor weather, take a moment to check how your fog lights work. Ensure you know how to turn them on and, equally important, how to turn them off when the conditions improve.”
Ultimately, using fog lights correctly is about safety. Not only do they help improve your own visibility in difficult conditions, but they also protect other drivers from hazards caused by excessive glare.
“Fog lights are there to help, but only when used correctly,” Graham concludes. “Getting it wrong could mean fines, accidents, or worse.”