condition mean min max 0 h after light 9.851555 9.70877 9.99434 4 h after light 3.62817 2.77731 4.47903 8 h after light 5.088115 4.93267 5.24356 4 h after dark 9.31573 8.17976 10.4517 8 h after dark 8.977905 7.06861 10.8872 12 h after dark 7.25211 7.10762 7.3966