| Answer | Crossword Clue |
|---|---|
| ARGON | Fluorescent lamp gas |
| ARGON | Fluorescent-lamp filler |
| ARGON | Fluorescent lamp filler |
| ARGON | Fluorescent bulb gas |
| ARGON | Fluorescent tube gas |
| KRYPTON | Gas in fluorescent lamps |
| ARGON | Gas in fluorescent bulbs |
| NEON | Gas in some fluorescent lights |
