condition mean min max 4 h after light 1.4696799999999999 1.45679 1.48257 8 h after light 1.89555 1.82395 1.96715 12 h after light 1.947975 1.86306 2.03289 4 h after dark 2.586795 2.5845 2.58909 8 h after dark 2.199185 1.99132 2.40705 12 h after dark 1.969505 1.77136 2.16765