condition mean min max 4 h after light 963.1 963.1 963.1 8 h after light 858.8 841.9 875.7 12 h after light 911.65 660.8 1162.5 4 h after dark 1657.0 1001.1 2312.9 8 h after dark 2131.95 1892.4 2371.5 12 h after dark 2141.25 1939.1 2343.4