condition mean min max 4 h after light 2.054335 1.67616 2.43251 8 h after light 1.719095 1.68635 1.75184 12 h after light 2.1012899999999997 1.86245 2.34013 4 h after dark 1.969135 1.60068 2.33759 8 h after dark 1.472745 1.39334 1.55215 12 h after dark 1.520375 1.31084 1.72991