| LZ4 High ambient lighting | Areas of human activity where the vision of human residents and users is adapted to high light levels |
| LZ3 Moderately high ambient lighting | Areas of human activity where the vision of human residents and users is adapted to moderately high light levels |
| LZ2 Moderately ambient lighting | Areas of human activity where the vision of human residents and users is adapted to moderate light levels. |
| LZ1 Low ambient lighting | Areas where lighting might adversely affect flora and fauna or disturb the character of the area |
| LZ0 No ambient lighting | Areas where the natural environment will be seriously and adversely affected by lighting. |