condition mean min max 0 h after light 1.869205 1.74829 1.99012 4 h after light 1.7489249999999998 1.74701 1.75084 8 h after light 1.469285 1.09082 1.84775 4 h after dark 1.672745 1.38322 1.96227 8 h after dark 2.409955 1.77909 3.04082 12 h after dark 1.586595 1.49823 1.67496