condition mean min max 4 h after light 925.6 925.6 925.6 8 h after light 892.45 860.3 924.6 12 h after light 816.6 724.6 908.6 4 h after dark 870.65 715.5 1025.8 8 h after dark 1147.05 1114.1 1180.0 12 h after dark 1156.3000000000002 1134.7 1177.9