condition mean min max 4 h after light 15.207819 15.120234 15.295404 8 h after light 17.2164185 15.282825 19.150012 12 h after light 14.318775 13.094696 15.542854 4 h after dark 17.029669 15.925235 18.134103 8 h after dark 16.270386000000002 15.925235 16.615537 12 h after dark 15.490045 15.490045 15.490045