I've had a Derasa & a Crocea survive under PC lighting in a 29g mixed mini-reef. Mind you that the lights were only a few inches of the top of the tank & the clams were placed only 4-5" from the top of the water column.
Notice I said survive. I had them for over eight months like this, so they were not just living off their fat reserve, but they were also not spectacular looking.
When I moved them into the current standard 55g with dual 250w SE MH lighting, you then started to see them thrive through coloration & mantle expansion.
So I would like to say that yeah, it could be done but you will not get to enjoy the animal to it's full potential. Another plus is that I'm able to keep all my clams on the sand bed including Maximas & Croceas in this type of setup with a 20" tank height & MH's 12" off the top.