condition mean min max 4 h after light 8.99814 8.774469999999999 9.266810000000001 8 h after light 9.270153333333333 9.11355 9.55797 12 h after light 9.694983333333335 9.530380000000001 9.88136 4 h after dark 9.77452 9.59356 10.080160000000001 8 h after dark 9.69575 9.46453 9.93872 12 h after dark 9.722116666666667 9.52882 10.02522