condition mean min max 0 h after light 18.69265 15.3468 22.0385 4 h after light 49.1623 40.5426 57.782 8 h after light 36.449600000000004 33.5032 39.396 4 h after dark 10.978285 9.76647 12.1901 8 h after dark 11.025105 9.60941 12.4408 12 h after dark 23.143349999999998 18.6414 27.6453