| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. dark, gloomy | 208 |
6.8%
|
| 2 | 2. poor light | 577 |
19%
|
| 3 | 3. average light | 1282 |
42.2%
|
| 4 | 4. bright | 973 |
32%
|
| Sysmiss | 1498 |