condition mean min max 4 h after light 726.0 726.0 726.0 8 h after light 828.4 825.0 831.8 12 h after light 841.8 760.7 922.9 4 h after dark 853.3 790.3 916.3 8 h after dark 862.95 797.5 928.4 12 h after dark 815.35 791.7 839.0