Depends on the leds.
If 1 amp is I-Max, then no!

Hmm, wait a monkey!
You have water cooling.
That's a game changer.
Might actually get away with it, but efficiency will suffer.

As you increase the current to near maximum, efficacy drops off rapidly.
It translates to less actual photons per watt.

That, and it's a calculated risk.
LEDs can become slag in microseconds.
Once that magic smoke gets out, C'est finis, yah?

Your call.
But I'd go with more photons every time.

This is almost as much fun as building another array. :D

Mahalo,
Weeze