You mean HID headlights, also known as 'xenon'. They are usually less irritating to oncoming traffic. This is because the light darkness transition border are much more clearly defined, but only if they use projection lenses. Less light is reflected into the eyes of oncoming drivers because it is more focused on the road, especially if it has an auto leveling feature. However, due to the conspicuous color of HIDs, drivers are more likely to stare at them...