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HIDs/xenon bulbs have a slightly bluish tint and are much brighter than regular halogen headlights.
LED bulbs have a lifespan and energy efficiency which are several times greater than halogen bulbs. LED lamps are more focused, emit brighter light and are generally found in high end cars.
On new vehicles, HID headlights are factory fitted and approved to European type approval regulations (EU) 2018/858 i.e., they have to meet an acceptable safety or quality standard before sale across Europe.
LED lamps are legal once they are type approved and fitted to vehicles for which they are compatible. If retrofitted, however, an LED headlamp is not always compatible with the vehicle. This can cause glare, which is more likely to dazzle. This is illegal under the lighting regulations.
For more information on HID/LED lamps, please see our FAQs