Editing Headlamp (section)

===== Glare =====
Vehicles equipped with HID headlamps (except motorcycles) are required by [[World Forum for Harmonization of Vehicle Regulations|ECE regulation 48]] also to be equipped with [[headlamp lens cleaning system]]s and automatic beam leveling control. Both of these measures are intended to reduce the tendency for high-output headlamps to cause high levels of [[Glare (vision)|glare]] to other road users. In North America, ECE R48 does not apply and while lens cleaners and beam levelers are permitted, they are not required;<ref>{{cite web |url=http://www.motivemag.com/pub/feature/tech/Motive_Tech_The_Difference_Between_US_and_European_Lights.shtml |title=The Difference Between US and European Lights |website=Motivemag.com |access-date=2010-12-29 |url-status=dead |archive-url=https://web.archive.org/web/20090501102913/http://www.motivemag.com/pub/feature/tech/Motive_Tech_The_Difference_Between_US_and_European_Lights.shtml |archive-date=1 May 2009 }}</ref> HID headlamps are markedly less prevalent in the US, where they have produced significant glare complaints.<ref name="NHTSA_8885"/> Scientific study of headlamp glare has shown that for any given intensity level, the light from HID headlamps is 40% more glaring than the light from tungsten-halogen headlamps.<ref name=Vanderlofske>{{cite web |url=http://www.nhtsa.gov/DOT/NHTSA/NVS/Public%20Meetings/Presentations/2004%20Meetings/VanDerlofske.pdf |title=What Is Glare? p. 24 |website=Webcitation.org |access-date=2012-01-31 |url-status=dead |archive-url= https://web.archive.org/web/20111021132641/http://www.nhtsa.gov/DOT/NHTSA/NVS/Public%20Meetings/Presentations/2004%20Meetings/VanDerlofske.pdf |archive-date=21 October 2011}}</ref>