| Answer | Crossword Clue |
|---|---|
| XENON | Flash lamp gas |
| STROBE | Flash lamp |
| XENON | Flash lamp filler |
| XENON | Photographic flash gas |
| XENON | Gas used in flash lamps |
| NEON | Lamp gas |
| NEON | Gas lamp |
| XENON | Arc-lamp gas |
| XENON | Stroboscopic-lamp gas |
| XENON | Arc lamp gas |
| ARGON | Incandescent lamp gas |
| ARGON | Fluorescent lamp gas |
| NEON | Glow lamp gas. |
| NEON | Inert lamp gas |
