If I understang correctly, the LED array operates at 19v 2.5A, so it is dissipating 47.5 Watts.
47.5Watts is 47.5 Joules/Second.
You are worried about 33.8uJoules.
If those joules are dissipated in 1uS, the power will be 33.8Watts (in 1uS).
We do not know how fast the capacitor will discharge into the LED array, the resistance of the circuit will have a big influence on the peak current etc.
If you are really worried by this, why not set up at test jig.
Have a 100nF capacitor charged to 30 volts, and discharge it through a LED array.
Do this once, then 10 times, then 100 times, and then let it run for a week if you must.
Then check the LEDs for degradation in their performance.
A practical test trumps all the theoretical soul seaching and hand wringing.
JimB
Of course if the LEDs were inductively coupled, that would probably slug the capacitive discharge transient.
(I am sorry but the devil just made me say that.
)