condition mean min max 4 h after light 6.39785 5.74814 7.04756 8 h after light 13.41365 13.0342 13.7931 12 h after light 11.2308 10.3399 12.1217 4 h after dark 7.505075 7.49943 7.51072 8 h after dark 4.618315000000001 4.37499 4.86164 12 h after dark 5.5509450000000005 4.99095 6.11094