condition mean min max 4 h after light 6.015755 5.46397 6.56754 8 h after light 2.652105 2.35719 2.94702 12 h after light 3.948045 3.64698 4.24911 4 h after dark 4.225185 4.15086 4.29951 8 h after dark 7.00024 6.38071 7.61977 12 h after dark 5.570085000000001 5.25978 5.88039