condition mean min max 4 h after light 63.4402 59.2388 67.6416 8 h after light 69.31625 68.1911 70.4414 12 h after light 69.9229 68.7644 71.0814 4 h after dark 89.41676666666666 85.2268 91.8672 8 h after dark 117.06133333333334 110.222 125.221 12 h after dark 86.47916666666667 83.4526 90.0823