firs thing i need to know how many leds you wanna power it would be easier to wire all of them in series instead of parallel like you have there the brightness will remain the same.
In series voltage adds and current stays the same.
In parallel voltage remains the same and current adds.
Different color leds require different voltages so it would be best to stick with one color. but let me know how many and what color leds your gonna use and i will help ya
