condition mean min max 4 h after light 6.482425 6.40136 6.56349 8 h after light 7.855219999999999 7.60668 8.10376 12 h after light 10.725455 9.66231 11.7886 4 h after dark 9.44981 9.25808 9.64154 8 h after dark 8.202175 8.18892 8.21543 12 h after dark 7.999459999999999 7.89568 8.10324