| Value | Category |
|---|---|
| 1 | Public electricity network |
| 2 | Collective private electricity network |
| 3 | Own electricity generator or plant |
| 4 | Solar energy |
| 5 | Candle |
| 6 | Gas lamp |
| 7 | Firewood |
| 8 | Other |
| 9 | Not used (no electric lighting) |
| 98 | Don't Know/Not Known |
| 99 | Refused/No response |