condition mean min max 0 h after light 5.945085000000001 5.81876 6.07141 4 h after light 5.488055 5.327 5.64911 8 h after light 8.437325000000001 8.20771 8.66694 4 h after dark 11.38275 10.8789 11.8866 8 h after dark 9.45486 9.09095 9.81877 12 h after dark 6.5592749999999995 6.14319 6.97536