condition mean min max 4 h after light 9.309878000000001 9.068616 9.55114 8 h after light 8.600859 8.062806 9.138912 12 h after light 8.884007 8.867544 8.90047 4 h after dark 10.59267 10.302233 10.883107 8 h after dark 9.745255 8.598813 10.891697 12 h after dark 9.353245 9.353245 9.353245