condition mean min max 0 h after light 6.742865 6.71943 6.7663 4 h after light 8.038250000000001 7.40394 8.67256 8 h after light 7.04953 6.64811 7.45095 4 h after dark 8.743179999999999 8.58119 8.90517 8 h after dark 9.31237 8.86596 9.75878 12 h after dark 8.23556 8.07927 8.39185