condition mean min max 4 h after light 1048.0 1048.0 1048.0 8 h after light 966.2 826.9 1105.5 12 h after light 1215.6 1167.5 1263.7 4 h after dark 1064.4 909.7 1219.1 8 h after dark 899.0 851.6 946.4 12 h after dark 819.85 750.2 889.5