By law, at any time - day or night, when driving in Europe you must convert your headlamps to avoid dazzling other road users. This is a compulsory requirement in most countries. Failing to use headlamp beam converters when driving abroad, severley dazzles other road users. It's dangeours, illegal and must be prevented at all times - night or day (inc, rain, fog etc). Remember to remove the converters as soon as you return to the UK. These converters allow you to adjust your headlamps for driving on the right-hand side of the road, altering your beams pattern, which is different to those fitted on European left-hand-drive vehicles. They are suitable for all vehichles and include individual fitting diagrams for the latest 'Clear Glass Headlamps', 'Projector' and 'Xenon,' and 'Glass Line Pattern' headlamps inside the packaging.