condition mean min max 0 h after light 5.957345 5.75987 6.15482 4 h after light 7.28994 7.14597 7.43391 8 h after light 6.573315 6.49837 6.64826 4 h after dark 8.855615 8.47159 9.23964 8 h after dark 7.145849999999999 6.8073 7.4844 12 h after dark 5.8223199999999995 5.03311 6.61153