condition mean min max 4 h after light 514.6 514.6 514.6 8 h after light 608.1 547.0 669.2 12 h after light 768.75 579.0 958.5 4 h after dark 687.15 515.3 859.0 8 h after dark 544.25 425.6 662.9 12 h after dark 363.70000000000005 283.8 443.6