condition mean min max 4 h after light 814.3 814.3 814.3 8 h after light 962.5 813.5 1111.5 12 h after light 917.0 798.0 1036.0 4 h after dark 946.4000000000001 745.9 1146.9 8 h after dark 843.1 786.6 899.6 12 h after dark 808.8 781.5 836.1