condition mean min max 4 h after light 599.4584675 530.924258 667.992677 8 h after light 682.5141625 607.487208 757.541117 12 h after light 817.2560435 806.481983 828.030104 4 h after dark 807.2076765 617.283616 997.131737 8 h after dark 1013.3980885 782.34584 1244.450337 12 h after dark 1440.655134 1440.655134 1440.655134