"Paul Cardinale" <email@example.com> wrote in message news://firstname.lastname@example.org... > "Paul Lutus" <email@example.com> wrote in message news:<wQzP7.119634$YD.firstname.lastname@example.org>... > > "Paul Cardinale" <email@example.com> wrote in message > > news://firstname.lastname@example.org... > > > > > Halogen lamps are not gas-discharge lamps. > > > > Sorry -- I meant to say "metal halide." A typo. > > > > > Neon (& other noble gas) lamps, > > > may have no ballast, or just a series resistor. > > > > In any event, they cannot do without a ballast. They are never run with no > > ballast, unless they are connected to a constant-current source. > > I have an argon lamp that runs directly off the household AC, no ballast.