condition mean min max 2 h after light 7.5968333333333335 7.42414 7.75316 6 h after light 7.479123333333333 7.33177 7.72023 10 h after light 8.343316666666666 8.02595 8.71976 2 h after dark 10.352599999999999 10.1892 10.4919 6 h after dark 7.12695 6.46107 7.69462 10 h after dark 5.03947 4.88223 5.17641