Dts, clams and no light!

[dlh5150]

I have a 120G tank (48"x24"x24"). My lighting is 4 - 46.5" 110W URI VHOs (2 - actinic, 2- 50/50) powered by an Icecap 660 ballast. The inside of my canopy is painted a flat white to help diffuse the light, but I also have a highly polished aluminum reflector behind the lights. My tank sure "looks" bright. My sand averages around 24" away from the lights. I want to know if I can successfully keep any clams (preferrably a Crocea because they do not get as large as the other species).

Thanks,

dlh