condition mean min max 4 h after light 66.9195 66.8962 66.9428 8 h after light 79.29515 76.8007 81.7896 12 h after light 67.4325 60.1091 74.7559 4 h after dark 93.0951 84.4212 101.769 8 h after dark 92.281 90.1494 94.4126 12 h after dark 95.66145 94.69 96.6329