Jasen Betts wrote in a message to Roy J. Tellason:

 RJT> How much current does a typical headlight draw,  anyway?

 JB> At 50 to 120 watts on high beam (since the dip filament usually
 JB> dies first) between 4 and 10 amps depending on which one you have.

 RJT> thinking that a sealed beam with one of two filaments burned out
 RJT> might be handy.

 JB> that'd work but could be a bit bulky... bare bulbs (with nor
 JB> reflector or lens) are only a few bucks new.

Sure, but why buy what you can have at no cost?

 RJT> Tail lights aren't that heavy a draw,  and I think a stop light is
 RJT> only going to something like 4A or so,  but

 JB> at 25W each 4A for the pair...

Ah,  for the pair.  Maybe I measured it,  a long time ago,  I don't recall.
 Okay,  2A each,  then.  And somewhat less for the other filament in that
bulb if they're using the dual-filament bulbs.

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