I've went through a few different forums but found that these two have the most constructive answers I was looking for.
In general, the answer is yes. But it depends on how the light was made (home made, cheaply made in China, etc), the total wattage of the light, distance of light from water, distance of clam from water surface etc.
I can definitely attest that clams not only survive, but thrive under LED.
I have had my aqua illumination sol blue for more than 6 months now. And I've kept my three big clams in there for almost 5 months. I programmed my light to mimic the natural sunlight intensity bell curve throughout the day with the highest being 3pm at about 85% and down to 15% at beginning and ending of the day. The largest of the three squamosa grew 2", from 7" to 9", the derasa is a bit more sensitive to fish swim by so grew a bit slower, about 1.5", from 6 to 7.5". The smallest of the three is also a squamosa, grew from 5" to about 7" now. My calcium level was around 500 before these clams were in. And now I am struggling to keep it over 350 when they grow this fast! My tank is 92 Corner and they are all sitting at the very bottom. So yes, you can definitely keep clams happy with LED lights.
