Does this neon indicator light require a resistor to limit current?
Since these neon indicator lamps are described as operating from 125 or 250 Volts, depending on model, they will include the necesssary resistor, and can be connected directly to the specified voltage.

Likewise, the LED versions will include the necessary current limiting to allow them to be operated from the listed voltage, with no external components.

You only need a current-limiting resistor with a "bare" neon lamp or LED.