condition mean min max 0 h after light 21.39405 20.4829 22.3052 4 h after light 18.23555 13.2576 23.2135 8 h after light 48.0865 41.6264 54.5466 4 h after dark 43.28075 40.3144 46.2471 8 h after dark 31.57795 26.8496 36.3063 12 h after dark 23.263399999999997 22.3953 24.1315