condition mean min max 2 h after light 6.307613333333333 5.6277 7.87194 6 h after light 6.81742 5.59366 8.49186 10 h after light 7.973575 4.69373 9.94595 14 h after light 8.673556666666666 6.37939 10.3667 18 h after light 7.468021666666667 5.21802 10.5495 2 h after dark 8.14114 5.94958 10.3293