condition mean min max 4 h after light 16.88615 15.003 18.7693 8 h after light 13.641449999999999 12.9934 14.2895 12 h after light 17.403399999999998 16.7027 18.1041 4 h after dark 22.84776666666667 20.9877 25.3031 8 h after dark 21.262166666666666 20.127 22.2204 12 h after dark 18.69063333333333 16.2979 20.0753