that bulb looks like a 25k bulb! I don't know, considering your only running 2 24" bulbs, LEDs might not save much money, your easiest option may just be to stick with what you have, unless of course your just feeling like building something?
I like the idea of those rapidLED's...that will wait till a bigger tank.
Filter clean and new filter medium installed....now to get some ammonia rockin'!