condition mean min max 0 h after light 3.671935 3.11878 4.22509 4 h after light 6.881015 5.21138 8.55065 8 h after light 2.66866 2.03726 3.30006 4 h after dark 3.283315 2.83918 3.72745 8 h after dark 5.72286 4.5992 6.84652 12 h after dark 4.916855 2.66489 7.16882