condition mean min max 4 h after light 1155.012536 1068.001288 1242.023784 8 h after light 1003.8871955 982.523935 1025.250456 12 h after light 933.245156 840.319046 1026.171266 4 h after dark 817.031758 779.334757 854.728759 8 h after dark 720.3114435 663.313752 777.309135 12 h after dark 836.693595 836.693595 836.693595