| Answer | Crossword Clue |
|---|---|
| ARGON | Gas in fluorescent bulbs |
| KRYPTON | Gas in fluorescent lamps |
| NEON | Gas in some fluorescent lights |
| ARGON | Gas in bulbs |
| NEON | Gas in some bulbs |
| ARGON | Gas in incandescent bulbs |
| ARGON | Gas used in light bulbs. |
| ARGON | Gas used in light bulbs, radio tubes, etc. |
