high beams
noun /ˈhaɪ biːmz/
  /ˈhaɪ biːmz/
 [plural] (North American English)Idioms - the lights on a car when they are pointing a long way ahead, not down at the road- Turn on your high beams.
 
Idioms 
on high beam 
- (of the lights on a car) pointing a long way ahead, not down at the road