condition mean min max 0 h after light 3.419495 3.31765 3.52134 4 h after light 4.76952 4.41085 5.12819 8 h after light 4.400705 3.82209 4.97932 4 h after dark 6.44675 6.27681 6.61669 8 h after dark 5.765495 5.23662 6.29437 12 h after dark 4.859585 4.21431 5.50486