condition mean min max 4 h after light 1.6163949999999998 1.26226 1.97053 8 h after light 1.8329 1.78635 1.87945 12 h after light 1.4483700000000002 1.44052 1.45622 4 h after dark 1.52087 1.51006 1.53168 8 h after dark 1.33976 1.28649 1.39303 12 h after dark 1.6433900000000001 1.54129 1.74549