That's a LOT of light. 
What is your plan for this beast?
You should run the LEDs in series rather than parallel. You'll have better control over them and use less amperage, which will be safer too. Also, power LEDs MUST be driven with a constant current driver or they can thermal runaway and cook very easily. (The hotter they get, the more current they draw, the hotter they get, ad destructum).
EDIT: Gaaa! Common cathode. Never mind the series suggestion.