condition mean min max 0 h after light 6.81054 6.7922 6.82888 4 h after light 4.104895 4.02577 4.18402 8 h after light 4.29831 3.6743 4.92232 4 h after dark 5.54421 5.46128 5.62714 8 h after dark 5.3571349999999995 4.804 5.91027 12 h after dark 5.4276 4.71746 6.13774