| Answer | Crossword Clue |
|---|---|
| ARGON | Incandescent bulb gas |
| ARGON | Incandescent lamp gas |
| ARGON | Gas in incandescent bulbs |
| ARGON | Gas in incandescent lamps |
| YTTRIA | Oxide in incandescent gas mantles |
| ARGON | Gas used in incandescent lamps |
| ARGON | Gas in incandescent lamps, perhaps |
| YTTRIA | White powder used in incandescent gas |
