condition mean min max 4 h after light 535.6 535.6 535.6 8 h after light 493.4 454.4 532.4 12 h after light 569.65 564.5 574.8 4 h after dark 633.9000000000001 561.2 706.6 8 h after dark 697.8 679.6 716.0 12 h after dark 726.8499999999999 716.8 736.9