condition mean min max 4 h after light 716.9 716.9 716.9 8 h after light 645.8 609.7 681.9 12 h after light 630.1 527.1 733.1 4 h after dark 608.85 592.0 625.7 8 h after dark 617.55 568.5 666.6 12 h after dark 598.3499999999999 540.9 655.8