condition mean min max 0 h after light 7.42567 6.59278 8.25856 4 h after light 4.824185 3.28705 6.36132 8 h after light 4.591145 4.20335 4.97894 4 h after dark 9.081745 7.85749 10.306 8 h after dark 7.07964 6.27981 7.87947 12 h after dark 7.01328 6.68116 7.3454