condition mean min max 4 h after light 10.18723 6.62879 12.9636 8 h after light 21.13423 7.44679 31.8449 12 h after light 16.906133333333333 11.9494 21.6573 4 h after dark 14.584186666666666 9.89776 17.9651 8 h after dark 12.905 10.8633 15.9124 12 h after dark 8.83456 7.75774 10.6547