Crossword puzzle clue "gas used in light tubes"

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Here are the possible solutions for gas used in light tubes clue

Answer
Clue
Relevancy
argon
Clue
Gas used in light tubes
Gas used in light bulbs, radio tubes, etc.
Inert gas used to fill light bulbs
Definition
an inert gaseous element
xenon
Clue
Gas used in TV tubes
Gas used in tubes
neon
Clue
Gas that fills tubes in colorful signs
Inert gas in vacuum tubes
Gas in some sign tubes
Definition
a gaseous element

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