I bought a used fixture, it came with hamilton 14k, past it's prime. I need to replace asap, I will be keeping clams and sps at bottom of 24" tank. I have been researching highest lumen output for 250W 14k bulbs, and they vary by 10,00 lumens between brands. One of the ones on ebay claims 85cri with 17000 lumens. That still seems low to me, but can't find the stats for name brand bulbs. So I don't prefer anything yet. Any suggestions anyone.