condition mean min max 4 h after light 2.24643 1.99832 2.49454 8 h after light 2.41644 2.37821 2.45467 12 h after light 3.615495 3.50821 3.72278 4 h after dark 6.145145 5.68667 6.60362 8 h after dark 4.219855 3.68791 4.7518 12 h after dark 3.692685 3.14951 4.23586