condition mean min max 0 h after light 16.7653 16.7504 16.7802 4 h after light 6.51947 5.61276 7.42618 8 h after light 5.937135 4.89372 6.98055 4 h after dark 8.29618 7.87003 8.72233 8 h after dark 9.560490000000001 9.26706 9.85392 12 h after dark 14.36875 10.2134 18.5241