condition mean min max 4 h after light 9.9243545 9.485958 10.362751 8 h after light 9.977881 9.368883 10.586879 12 h after light 11.468048 10.586879 12.349217 4 h after dark 10.335103 10.215957 10.454249 8 h after dark 14.543611 14.415463 14.671759 12 h after dark 10.586879 10.586879 10.586879