condition mean min max 2 h after light 9.185346666666666 7.23049 13.0549 6 h after light 6.685665 4.79116 8.28608 10 h after light 6.176496666666667 4.37739 7.29574 14 h after light 6.78783 4.76036 8.43135 18 h after light 8.292733333333333 6.13927 13.7244 2 h after dark 7.61399 5.36346 9.29845