condition mean min max 4 h after light 9.26368 8.45796 10.0694 8 h after light 4.51125 4.02745 4.99505 12 h after light 3.997305 3.96851 4.0261 4 h after dark 7.3786266666666664 6.79531 7.9483 8 h after dark 8.373676666666666 7.54038 9.29598 12 h after dark 10.244346666666667 9.14174 11.3517