condition mean min max 4 h after light 535.9 535.9 535.9 8 h after light 602.75 533.8 671.7 12 h after light 497.55 473.6 521.5 4 h after dark 617.45 466.6 768.3 8 h after dark 655.6500000000001 614.6 696.7 12 h after dark 684.05 638.9 729.2