| Answer | Crossword Clue |
|---|---|
| NEON | Inert element used in lights |
| XENON | Inert gas used in lights |
| XENON | Element in strobe lights |
| ARGON | Inert gas used in welding |
| ARGON | Inert gas used in vacuum tubes |
| NEON | Gas used in lights |
| HALIDE | Compound used in street lights |
| NEON | Gas used in tubular lights. |
| SPOTS | Lights used in the theatre. |
| XENON | Gas used in strobe lights |
