condition mean min max 4 h after light 1.06898 0.96768 1.17028 8 h after light 1.925955 1.48151 2.3704 12 h after light 2.150525 1.79204 2.50901 4 h after dark 3.568135 3.54253 3.59374 8 h after dark 3.070685 2.7897 3.35167 12 h after dark 2.76365 2.16387 3.36343