condition mean min max 2 h after light 9.68871 8.93101 10.4563 6 h after light 9.635883333333334 9.00848 10.0253 10 h after light 8.740353333333333 8.04219 9.09991 2 h after dark 12.7088 11.4897 13.7582 6 h after dark 20.9642 20.7965 21.1542 10 h after dark 25.6518 25.0343 26.0106