From doing a quick reading (aquatopled, Bridgelux and Epistar)
your array is running at 50% of its capacity I wouldn't suggest running it hygher as I am not to sure about Bridgelux and Epistar LEDs.
So to say your leds are rated at 6w but in actual running at 600 to 700ma
That said I think what Martin is offering is good for your array.
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