Headlamp query

[Happily1986]

Is anyone familiar with the internal workings/ circuit layout for the headlamp. I am just curious here. Given that both headlamps are 2x setups i.e. one lowbeam and one highbeam, assuming when you flick the high beam, the low beam still stays on right?

 

So in that case, the sudden surge of voltage, will it cause the circuitry to decrease in lifespan significantly if say one has a propensity to flick his headlamp furiously frequently?

 

Thanks

[Kyojin]

depends on the setup. i think you are referring to the 2-in-1 types.

 

high and low beams come from the same bulb for example the H4 55/65W bulbs. there are two filaments in this case.