condition mean min max 4 h after light 786.5 786.5 786.5 8 h after light 791.9 751.8 832.0 12 h after light 811.35 735.5 887.2 4 h after dark 1043.7 1028.2 1059.2 8 h after dark 933.3 889.8 976.8 12 h after dark 820.05 780.1 860.0