condition mean min max 4 h after light 1068.1 1068.1 1068.1 8 h after light 1080.3 1079.6 1081.0 12 h after light 1002.9 953.8 1052.0 4 h after dark 1035.1999999999998 981.8 1088.6 8 h after dark 1171.35 1103.7 1239.0 12 h after dark 1164.1 1095.5 1232.7