condition mean min max 0 h after light 7.248255 7.18295 7.31356 4 h after light 8.172600000000001 7.01362 9.33158 8 h after light 17.7635 17.2251 18.3019 4 h after dark 18.2691 15.4122 21.126 8 h after dark 12.259 10.1121 14.4059 12 h after dark 9.703855 9.52619 9.88152