condition mean min max 4 h after light 1077.3 1077.3 1077.3 8 h after light 1019.25 964.8 1073.7 12 h after light 972.95 918.5 1027.4 4 h after dark 1125.95 906.4 1345.5 8 h after dark 1225.35 1208.4 1242.3 12 h after dark 1158.5 1100.0 1217.0