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 ...

Turn the aquarium light off during nighttime hours Create an artificial, routine day-and-night cycle Utilize colored LED lighting Use timers and programmable lights to keep a regular schedule Of ...