condition mean min max 4 h after light 2.00512 1.9472 2.06304 8 h after light 3.05685 2.72999 3.38371 12 h after light 2.930935 2.57572 3.28615 4 h after dark 5.432525 5.07703 5.78802 8 h after dark 3.6894 3.3149 4.0639 12 h after dark 3.37739 2.67539 4.07939