condition mean min max 4 h after light 8.30881 7.25522 9.3624 8 h after light 4.817159999999999 4.66195 4.97237 12 h after light 5.276465 5.27576 5.27717 4 h after dark 6.80405 6.41875 7.13087 8 h after dark 8.747396666666667 8.41003 9.2613 12 h after dark 7.019266666666667 6.43395 7.64557