condition mean min max 3 h after light 8.722606666666666 8.56449 8.81185 6 h after light 9.194846666666667 8.13655 10.3298 9 h after light 8.016646666666666 7.25585 8.64705 12 h after light 7.50941 6.18075 8.25267 3 h after dark 7.460293333333333 6.86691 8.15697 6 h after dark 9.007629999999999 6.51489 10.5071 9 h after dark 6.51793 5.38948 8.74034 12 h after dark 4.774075 3.82638 5.72177