condition mean min max 4 h after light 1.60216 1.34732 1.857 8 h after light 1.466645 1.35443 1.57886 12 h after light 2.1465899999999998 2.04632 2.24686 4 h after dark 2.7557899999999997 2.56071 3.01429 8 h after dark 2.2974733333333335 2.17657 2.45667 12 h after dark 1.4730033333333334 1.32325 1.69548