I think the 40 breeder is only 13" tall. So with a tank that shallow i think you would have success with softies, LPS
, and even a good portion of SPS
. Some of the more picky SPS
may give you a bit of a problem but i would think most will be ok so close to the lights.
If you went with a bubble tip anemone i think you would be fine. Some of the more difficult species i would probably avoid not only because of light but just keeping stable enough parameters for such a particular invert in a tank that size is very challenging.