why is it that when your headlight burns out, you are still able to have bright lights?
You step into the stream, yet the water keeps moving…Now you are in the presence of abscence
two separate filaments in the headlamp - one for high beam, one for low beam?
just a SWAG
There’s two sets of filaments in current headlight bulbs. When one burns out, the other often keeps working.
This is just like the 3-way bulbs in home lamps. A 50-100-150 bulb has a 50-watt filament and a 100-watt element. When you switch both on, you get 150-watts worth of lighting. Sometimes one filament burns out first. If the 100 does, the 50 still works and comes on with every other click. If the 50 goes first, the 100 will work and will stay on for two clicks, then off for two clicks.
In the “good old days”, cars had two separate pairs of bulbs for high-beams. I think the highs were aimed slightly higher.
Wrong thinking is punished, right thinking is just as swiftly rewarded. You’ll find it an effective combination.
Generally speaking there are two independent filaments. When one burns out the other will still function.
And whatever you do, don’t flash your high beams at drivers with their headlights off. They’ll follow you home, kill you, and take your kidneys. 
Wrong thinking is punished, right thinking is just as swiftly rewarded. You’ll find it an effective combination.
Yeah, AWB, but the worst part is waking up and finding yourself in that bathtub full of ice…
I don’t know why fortune smiles on some and lets the rest go free…
T