condition mean min max 4 h after light 1008.1 1008.1 1008.1 8 h after light 747.6 744.0 751.2 12 h after light 721.75 600.1 843.4 4 h after dark 747.8 708.2 787.4 8 h after dark 925.8000000000001 758.7 1092.9 12 h after dark 896.7 826.4 967.0