During the mid-80s the government released ideas for 'dim-dip' lighting – to be used in city areas during the night time – but these ended up scuppered when expectations couldn't be agreed; ‘dim-dip’ switched on headlights at lessened brightness once the ignition and facet lights have been on Please note https://car-tail-lights09976.articlesblogger.com/51782096/new-step-by-step-map-for-daytime-running-tail-lights