I have had BTA for 6 years. At times even had 8. I don't think light is enough as others have said but if your sps corals are doing fine I think Anenome will be ok. If not enough light anenome will move around and pick the highest rock and stretch open towards the light if too much it will move down to sand area.
Just make sure to buy one that's been in a tank few generations and not wild from store.
This is what mine looks like
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