On Friday, November 20, 2015 at 2:55:22 PM UTC-6, Madness wrote:
Just acquired a bunch of these lamps. They're in the same mini-bayonet
style as lamps like the #44/47. But would anyone know if these lamps can
be connected directly to 120 volts? Or do they need a resistor, @ if so,
what value?

anywhere from 100,000 - 200,000 ohms, 1/2 watt or larger. Smaller resistor, brighter light, shorter bulb life.