condition mean min max 4 h after light 52.513149999999996 49.3129 55.7134 8 h after light 15.0002 14.6364 15.364 12 h after light 6.3864350000000005 5.76757 7.0053 4 h after dark 6.26975 5.78311 6.75639 8 h after dark 13.380600000000001 12.7947 13.9665 12 h after dark 31.86065 29.1666 34.5547