Jim, an icecap 430 will only power two bulbs. For a three or a four bulb setup you need a 660. WIth my t5 setup, I went all icecap for reflectors, endcaps and standoffs. Couldnt be happier. Also, icecap ballasts overdrive t5 bulbs so you might be able to get away with two bulbs. I also got all my stuff from reefgeek