There is no fixed autumn start date or spring end date for using dipped headlights in Ireland or the UK. The rules apply all year and depend on the time of day, the road and how well you can see. In autumn, earlier sunsets, fog and heavy rain mean you may need your headlights well before the evening commute is over.
Republic of Ireland: When are dipped headlights required?
In the Republic of Ireland, lighting-up hours run from 30 minutes after local sunset until 30 minutes before local sunrise. Headlights are required during those hours. You must also use headlights outside those hours if fading daylight or poor weather reduces visibility enough to make them necessary for safe driving. That means you may need them before the formal lighting-up period begins or after it ends.
Use dipped headlights at dusk and dawn, on well-lit urban roads at night, when following another vehicle or when approaching oncoming traffic. On an unlit road, use main beam only when it can help you see farther without dazzling anyone. Read the Irish vehicle lighting regulations and the RSA Rules of the Road.
What is the penalty in Ireland?
For a lighting offence prosecuted under the general penalty provision of the Road Traffic Act, a first conviction can carry a court fine of up to €1,000 where no specific penalty applies. Ireland also has a €60 fixed charge for certain lighting equipment offences, including using a vehicle without prescribed lamps fitted. The applicable penalty depends on the offence charged. See section 102 of the Road Traffic Act 1961 and the Irish fixed-charge regulations.
Great Britain: When are dipped headlights required?
In England, Scotland and Wales, the Highway Code says you must use headlights at night, with an exception for qualifying roads with lit street lighting. For this rule, night starts 30 minutes after sunset and ends 30 minutes before sunrise. Sidelights and rear number plate lights must be on between sunset and sunrise.
You must also use headlights when visibility is seriously reduced, generally when you cannot see more than 100 metres. That rule applies in daylight too. Use dipped headlights in dull daytime conditions to help other road users see you. See Highway Code rules 113 to 116 and Highway Code rule 226 on reduced visibility.
What is the penalty in Great Britain?
A lighting offence dealt with by a standard non-endorsable fixed penalty can result in a £50 fine with no penalty points. The outcome can differ if the circumstances lead to a separate charge. See the Fixed Penalty Order and the Department for Transport’s fixed penalty guidance.
Northern Ireland: Headlight rules and fines
Northern Ireland has its own Highway Code. It requires headlights at night, from 30 minutes after sunset to 30 minutes before sunrise, and when visibility is seriously reduced, generally below 100 metres. Sidelights and rear number plate lights must be lit from sunset to sunrise. Read Northern Ireland Highway Code rule 113 and Northern Ireland Highway Code rule 226.
The PSNI lists lighting offences among those that can be dealt with by a £30 non-endorsable fixed penalty with no penalty points. See the PSNI guide to fixed penalty notices.
Can you rely on daytime running lights in fog or heavy rain?
Daytime running lights can leave the rear of some cars unlit. If fog, heavy rain or road spray makes it hard to see other vehicles, switch on dipped headlights and check that your rear lights are on too. If your car has automatic lights, check what they do in daytime fog or spray and switch them on manually if needed.
If you’re browsing used cars for sale in Ireland, check both dipped headlights and the rear lights during the viewing. If the car has an automatic light setting, ask the seller to show you how to switch to dipped beam manually.
