condition mean min max 0 h after light 8.830645 8.21648 9.44481 4 h after light 12.52355 11.8212 13.2259 8 h after light 27.737299999999998 25.0462 30.4284 4 h after dark 26.96015 24.262 29.6583 8 h after dark 17.34645 17.2798 17.4131 12 h after dark 9.874865 9.16153 10.5882