condition mean min max 4 h after light 1.6661350000000001 1.56281 1.76946 8 h after light 1.80763 1.70903 1.90623 12 h after light 1.68606 1.50578 1.86634 4 h after dark 1.73543 1.63779 1.83307 8 h after dark 1.594335 1.55372 1.63495 12 h after dark 1.666645 1.64279 1.6905