It's not my clam, it's my friends, the reason I ask is because he has had it in his tank for over a year, it is a 55G with 240W of PC lighting. He keeps telling me to get a clam, but I keep insisting I don't have enough light, and try to convince him that he doesn't either. If this guy really "required" bright light, metal halide, etc... wouldn't it have been dead by now? Im not trying to say that clams don't need high light, just wondering how his is living fairly well in his lighting?