Frag tank lighting... What's the best for growth?

[FragIt Dan]

I run twin 250W 14K Hamilton HQIs on my frag tank with a bit of PC supplementing, top row of frags are about 8" from the water surface and I had to raise the fixture 3" so the bulbs are about 8" off the water, the top rack were bleaching out and are doing much better since raising the fixture.
I got the fixture used for $200 and new bulbs for ~$120. LED would be great but I will wait until I sell some more frags to fund it
Dan