condition mean min max 4 h after light 7.443835 7.17995 7.70772 8 h after light 5.044025 4.89662 5.19143 12 h after light 4.4070599999999995 4.27043 4.54369 4 h after dark 13.716833333333334 13.078 14.292 8 h after dark 12.584566666666667 11.4363 13.8816 12 h after dark 15.065033333333334 14.6321 15.9074