Editing Headlamp (section)

==== Retrofitment ====
When a halogen headlamp is retrofitted with an HID bulb, light distribution and output are altered.<ref name="NHTSAR">{{cite web|url= http://www.nhtsa.gov/cars/rules/rulings/glare.html|title= Glare from Headlamps and other Front Mounted Lamps Federal Motor Vehicle Safety Standard No. 108; Lamps, Reflective Devices, and Associated Equipment|access-date= 4 November 2012|archive-date= 27 September 2011|archive-url= https://web.archive.org/web/20110927155258/http://www.nhtsa.gov/cars/rules/rulings/glare.html|url-status= dead}}</ref> In the United States, vehicle lighting that does not conform to FMVSS 108 is not street legal.<ref name="NHTSAR"/> Glare will be produced and the headlamp's type approval or certification becomes invalid with the altered light distribution, so the headlamp is no longer street-legal in some locales.<ref name="hella">{{cite web |url=http://dsl.torque.net/images/techdocs/Hella_No_Retrofit.jpg |title=Be Careful: Dangerous Products! HID kits and the law |publisher=Hella |access-date=29 May 2014 |url-status=dead |archive-url=https://web.archive.org/web/20110514023838/http://dsl.torque.net/images/techdocs/Hella_No_Retrofit.jpg |archive-date=14 May 2011 }}</ref> In the US, suppliers, importers and vendors that offer non-compliant kits are subject to civil fines. By October 2004, the [[National Highway Traffic Safety Administration|NHTSA]] had investigated 24 suppliers and all resulted in termination of sale or recalls.<ref>{{cite web |url=http://www.nhtsa.gov/About+NHTSA/Press+Releases/2004/ci.NHTSA+Illegal+Lighting+Crackdown+Continues.print |title=Nhtsa Illegal Lighting Crackdown Continues |website=Nhtsa.gov |date=19 October 2004 |access-date=29 May 2014 |archive-date=29 May 2014 |archive-url=https://web.archive.org/web/20140529232440/http://www.nhtsa.gov/About+NHTSA/Press+Releases/2004/ci.NHTSA+Illegal+Lighting+Crackdown+Continues.print |url-status=dead }}</ref>

In Europe and the many non-European countries applying [[United Nations Economic Commission for Europe#Inland Transport Committee|ECE]] Regulations, even HID headlamps designed as such must be equipped with lens cleaning and automatic self-leveling systems, except on motorcycles.<ref name="hella"/> These systems are usually absent on vehicles not originally equipped with HID lamps.