The outboard headlights in a four-light system or the main lights in a two-light system. The low beam is used for most applications of night driving. For those cars without day-time running lights, the low beam should be turned on. In fog and heavy snow, the low beam can provide more light on the road because the highbeam reflects light back to the driver .
LOW BEAM
Meaning of LOW BEAM in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012