condition mean min max 0 h after light 1.56816 1.51618 1.62014 4 h after light 1.825515 1.69419 1.95684 8 h after light 1.370255 1.30002 1.44049 4 h after dark 0.796335 0.49636 1.09631 8 h after dark 1.0001145 0.895949 1.10428 12 h after dark 1.3528335 0.888697 1.81697