Reverse saturation currents of a LED?
The materials used for LEDs have a larger energy gap than silicon so the reverse leakage is usually a few nA or less.  The devices are often not tested for that parameter however as it is not important for normal use so the data sheet may show a much higher value

They also typically have a low reverse voltage specification - again this is because in normal use they are only subjected to a few volts of reverse bias (for example in a typical multiplexed arrangement they will see the forward bias of another LED).