condition mean min max 4 h after light 828.2 828.2 828.2 8 h after light 747.5 704.4 790.6 12 h after light 717.3 664.4 770.2 4 h after dark 816.0 789.6 842.4 8 h after dark 819.65 744.9 894.4 12 h after dark 898.55 848.8 948.3