condition mean min max 2 h after light 3.9675149999999997 2.47878 5.61823 6 h after light 2.69956 1.2643 3.89699 10 h after light 2.724035 1.31826 4.62417 14 h after light 3.0994366666666666 1.89439 4.91696 18 h after light 2.687378333333333 1.61743 3.48422 2 h after dark 6.13974 3.77257 9.81823