condition mean min max 4 h after light 9.058641 8.559121 9.558161 8 h after light 7.950886 7.604398 8.297374 12 h after light 10.525631 10.377473 10.673789 4 h after dark 8.374936 7.008014 9.741858 8 h after dark 9.7839095 8.994278 10.573541 12 h after dark 9.045181 9.045181 9.045181