condition mean min max 4 h after light 850.0 850.0 850.0 8 h after light 571.4 507.2 635.6 12 h after light 564.55 389.8 739.3 4 h after dark 745.0 682.6 807.4 8 h after dark 796.45 570.7 1022.2 12 h after dark 909.6500000000001 855.2 964.1