condition mean min max 4 h after light 5.921795 5.54684 6.29675 8 h after light 4.96348 4.79226 5.1347 12 h after light 5.663975 5.64858 5.67937 4 h after dark 6.71745 6.42754 6.86645 8 h after dark 6.700146666666667 5.85397 7.78135 12 h after dark 6.161636666666666 5.84842 6.5974