condition mean min max 4 h after light 6.540649999999999 6.18546 6.89584 8 h after light 4.250249999999999 4.1373 4.3632 12 h after light 4.39302 4.10159 4.68445 4 h after dark 5.44473 5.21543 5.70617 8 h after dark 7.437126666666666 6.15858 8.37572 12 h after dark 7.9269300000000005 7.57937 8.40539