alawofonlyhavingaroundsealedheadlamp(thegasisfillednotinthebulbbutisfilledinside
theheadlampitself) installedintheircars.ManycountriesfollowedinthefootstepsoftheUS
butthelawwasnotthatfirmlyimplemented.WhileothercountriesmainlytheEuropeanones
didn't follow the US hence they progressed on a fasterpace as compared to the US.
European (top) and US (bottom)
InsometimethefirsthalogenbasedheadlampswereintroducedintheEuropeancountries.
Laterheadlampsrunningondifferentgasesandsourceswerealsointroducedinthemarket.But
thistechnologywasnotadoptedbytheUSduetothenormsthatwerestrictlyagainstit.But
latertheUSfacedtheconsequencesofnowadoptingthetechnologyasthesalesofthecarsin
theUScamedown,thecarcompaniesrefusedtoselltheircarsintheUS.ThuslatertheUSwas
also not left with any other option than to adoptthese technologies.
Design and Style,
Overtheyearsthedesignandstyleoftheheadlampsalsochanged.Europewasopentothese
stylesandgavefreedomtothecarmanufacturersaslongasthedesignswerenotagainstthe
safety rules of the country.Firstly the rectangular-shaped headlamps were famous in the
Europeancountriesintheearly1960s.OntheotherhandduetothelawsthattheUShadmade
not much development came in the designs of the headlampsof cars.
Several carcompanies agreedupon using the fourlampsinthecarsas itprovidedbetter
flexibilityforusinglowandhighbeamlightsanditalsolookedstylishwhenstackedoneabove
the other. While other car companies continued tomanufacture two lamped headlamps.