condition mean min max 4 h after light 9.574379 9.203481 9.945277 8 h after light 9.3874915 8.484845 10.290138 12 h after light 8.515395 7.87543 9.15536 4 h after dark 8.5027695 8.032522 8.973017 8 h after dark 9.218212000000001 8.721434 9.71499 12 h after dark 9.174905 9.174905 9.174905