condition mean min max 4 h after light 16.729118999999997 15.207607 18.250631 8 h after light 18.214180499999998 16.851249 19.577112 12 h after light 17.480285 16.597163 18.363407 4 h after dark 19.733680999999997 17.767718 21.699644 8 h after dark 14.848572 14.675154 15.02199 12 h after dark 14.869121 14.869121 14.869121