Iv created something very similar recently as my little project, iv used 12 * 3w 6500K white led,s and 4 * 3w rgb LEDs, the upshot of which my arduino ( with a pwm shield to drive the led drivers ...

this aquarium light fits the bill. It is the second iteration, but [William] calls it v1. That’s because v0 — which used a few loops of LED strips — never really met his requirements.