condition mean min max 0 h after light 1.729765 1.52371 1.93582 4 h after light 2.565415 2.45393 2.6769 8 h after light 3.53188 3.09657 3.96719 4 h after dark 4.28553 3.95381 4.61725 8 h after dark 2.05133 2.04272 2.05994 12 h after dark 2.378925 1.38087 3.37698