| Answer | Crossword Clue |
|---|---|
| ARGON | Gas used in light tubes |
| ARGON | Gas used in light bulbs, radio tubes, etc. |
| XENON | Gas used in tubes |
| XENON | Gas used in TV tubes |
| ARGON | Inert gas used in vacuum tubes |
| ARGON | Gas used in light bulbs. |
| flashtube | a gas discharge tube that produces very brief intense flashes of light and is used esp in photography |
| flashtubes | FLASHTUBE, a gas discharge tube that produces very brief intense flashes of light and is used esp in photography |
