afaik double contact un sir. pag naka highbeam, hindi na gumagana ung lowbeam kasi ung contact nasa highbeam na and vice versa.
when i turn on my lancer cedia's hi beams, the low beams remain switched on.. perhaps it's a choice of designs that the manufacturer has a choice over..
It may be variable speed I think. It's slowly being used on cars that either don't have an ICE, or...
A/c