condition mean min max 4 h after light 15.269963 13.821146 16.71878 8 h after light 14.332946499999998 13.243348 15.422545 12 h after light 14.622718500000001 13.75619 15.489247 4 h after dark 17.491194 15.857048 19.12534 8 h after dark 15.651564 15.377893 15.925235 12 h after dark 15.959363 15.959363 15.959363