IME BTA/RBTAs are pretty adaptable to just about any med to strong lighting. My RBTAs seem content under 6x39W T5 in a 57 G tank. Deeper might be pushing it...
Should be more than enough. I haven't found BTAs to need much light at all really. For me, they always tend to settle into spots between about 75-150PAR. So, that really isn't much at all, I think you could get than with PCs on most tanks...