Remember:
You must only use fog lights in dense fog or falling snow. Turn them off in clear weather or you will risk causing glare and may dazzle other drivers.
You may fit high mounted rear brake lights if you wish, but fitting other optional lighting is controlled by law.
Sections 16, 17 and 20 deal with the required lighting for motorcycles, bicycles, e-scooters and horse-drawn vehicles.
Before you change or alter the physical appearance of your vehicle, for example by fitting spot lights, bull bars or ornaments, take care not to increase the risk to road users, in particular the more vulnerable ones, for example cyclists and pedestrians.
The use of flashing lights, with the exception of direction indicators, is solely reserved for Gardaí, ambulance and other designated service vehicles. You must not fit blue or red flashing lights to your vehicle. See www.dttas.ie for details.
A vehicle must have white or yellow lights showing to the front and red lights showing to the rear, together with amber direction indicators and white or yellow reverse lamps.
You should not make any technical modifications to your vehicle without professional advice as these may have legal and safety implications.
You should also inform your insurance company, as some modifications can invalidate your insurance policy.
It is recommended that dipped headlights only be used when driving or when stopped in traffic. Avoid having them switched on when stopped at the side of the road. You should not use headlights when parked. If you need lights when parked or stopped, use ‘side’ lights or ‘parking’ lights.
If your vehicle is fitted with day time running lights, remember to switch on your dipped head lights at lighting up time.