condition mean min max 4 h after light 917.3 917.3 917.3 8 h after light 797.6 733.5 861.7 12 h after light 786.6500000000001 705.6 867.7 4 h after dark 929.15 762.7 1095.6 8 h after dark 1107.9 1061.2 1154.6 12 h after dark 943.5 847.0 1040.0