condition mean min max 4 h after light 6.020506666666667 5.72152 6.29668 8 h after light 6.137156666666667 5.8125800000000005 6.39656 12 h after light 5.980653333333334 5.8131900000000005 6.08177 4 h after dark 5.79353 5.38935 6.073259999999999 8 h after dark 5.91689 5.66469 6.26126 12 h after dark 5.936883333333333 5.6559 6.08487