condition mean min max 4 h after light 1.37904 1.37717 1.38091 8 h after light 1.356075 1.34987 1.36228 12 h after light 1.49764 1.45464 1.54064 4 h after dark 2.6051166666666665 2.31121 2.95319 8 h after dark 2.14643 1.87459 2.64358 12 h after dark 1.2277943333333332 0.741683 1.5157