Some people have kept anemones "successfully" in lower light tanks by feeding heavily. This isn't really appropriate husbandry IMHO. BTAs do not grow in low light areas with a lot of feed in the ocean, for that reason I would like to see something closer to their normal light needs.
In reading your signature it looks like you are in the process of upgrading your lighting. When you do, and it is good idea, be sure to acclimate your anemones to the new light.