condition mean min max 4 h after light 6.4479999999999995 6.22485 6.721089999999999 8 h after light 6.2833033333333335 6.1775 6.410080000000001 12 h after light 6.13905 5.89305 6.51856 4 h after dark 6.39212 6.24483 6.565410000000001 8 h after dark 6.46744 5.99164 6.941089999999999 12 h after dark 6.305586666666667 6.0951699999999995 6.49005