The Highway Code states that there are 2 basic rules you must follow when using your lights.
You must not use your lights in a way which would dazzle or cause discomfort to other road users, such as pedestrians, cyclists and horse riders
You must not use your front or rear fog lights unless visibility is seriously reduced. You must switch them off when visibility improves to avoid dazzling other road users
In stationary traffic queues, drivers should apply the parking brake. Once the following traffic has stopped, take their foot off the footbrake to deactivate the vehicle brake lights. This will minimise glare to road users behind until the traffic moves again.
All content is believed to be correct at time of publication.