Originally Posted by
agmetal
EDIT: Before anyone asks - yes, I realize that this will be underpowered compared to a modern light, but I specifically want to use this particular hub because it's more period-appropriate for the bike.
Just wanted to point out the other reason is because incandescent bulbs didn't last - 1-2 years before it burned out under ideal riding - less than that other times because incandescent bulbs are fragile.
An led-equivalent bulb would probably be the best way to go for that reason.
Sorry I don't have a specific suggestion.