maxima placement under t5 lighting

[ezsalt73]

I just purchased a small maxima clam for my 20 gallon long reef. I have t5 ho lighting. I have 2 currenx xtreme x2 fixtures with individually contoured reflectors. The bulbs are 2 ati blue plus 1 kz fiji purple and one uvl aquasun 10k. I have the clam placed in the upper portion of the rock work. Would i be able to place him on a piece of live rock down on the sand bed under this lighting, The tank is only 12 inches deep or should i keep him higher up on the rock?

[Urchinhead]

lower should be fine. If he starts to extend his mantle like he's reaching for the light move him.