| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | pilot light | Europe | Commonly used in older gas appliances to keep a constant flame for ignition | 1 |
| 2 | pilot light | Europe | Pilot lights are less common in modern gas appliances in Europe, as electronic ignitions are more prevalent. | 1 |
| 3 | pilot light | Europe | Less commonly used due to the prevalence of electric appliances and central heating systems | 1 |