An automated daytime running light system for surface transport vehicles having headlights and taillights which includes a daytime running light control circuit which activates the highbeam filament of the headlights at a reduced power level whenever the vehicle ignition is ON and the starter motor OFF...http://www.google.com/patents/US5614788?utm_source=gb-gplus-sharePatent US5614788 - Automated ambient condition responsive daytime running light system
