What gases are used in flurorescent bulbs?

Answer 1

Mercury

sodium

potassium

in different combinations and pressures

they are considered metals until they get hot

while operating they are plasma

so rarely are they gas

Answer 2

Street lamps are commonly plasma discharge lamps using either sodium, or high pressure sodium. A tiny quantity of neon is sometimes added to initiate the plasma discharge, and this is seen as a red glow for a short time after starting.

Answer 3

Krypton