condition mean min max 4 h after light 10.7013 10.3138 11.0888 8 h after light 8.18371 8.11549 8.25193 12 h after light 6.761995 5.96395 7.56004 4 h after dark 8.879116666666667 8.15739 9.7556 8 h after dark 9.338006666666667 8.87207 10.1608 12 h after dark 9.238753333333333 8.52224 9.65389