Finding the right light bulb for Perreaux SM3

Photo? Bulbs come in many formats. I have a large collection, some use sockets, some have wire leads. The socketed one use all manner of socket types. SOme bayonet, some fuse clip style, etc.

A bulb might run on such voltage, but if it is open, a series resistor will not be able to drop any voltage. Same for LEDs in fact. A dropping resistor requires current to flow to drop voltage.

LEDs come as parts, but there are also LEDs in small housings with integrated resistor.
 
This is a photo of the light bulb. It's attached to two wires directly via a 'socket' (round disc with two holes at the top of photo).
 

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