In article , Lizard Blizzard wrote:
Neon lamps need a current limiting resistor, something like 47k or so,
but not a transformer. Some of the screw base neons have the resistor

That's the case with the teenytiny neon night-lights that are commonly
built into clock radios and things. They sell those at Radio Shack.
Bought a two-pack there last year.

The large neon tube signs need a ballast in order to kick start the
tube...similar to fluorecent lights.

--
Sven Weil
New York City, U.S.A.