This is a kessil 160 about 6 inches over a 14g tank. It's at 75% for 6 hours. My anemones live right below the light and split about every 6 months. They look different all they time but never look like your picture when the lights are on.
Anemones are light hogs. I have a kessil a80 on my freshwater shrimp tank and wouldn't use that light on anything bigger than a 10 gallon. As you see I have to a160 on my 14g and to be honest I have some shading issues to deal with long term.
My recommendation is an A360 or A160 plus some T5. I think the results you are getting with your current light isnt meeting your expectations. If you would have went with a light setup like this from the start you would be dealing with a thriving splitting anemone instead of a struggling one. If you are attempting to save money I would go with a AI prime and some T5 for all the reasons of the other posters. You also don't need t5 light additions for a while but I would still recommend.
Kessils are great but expensive. And their connectibility is subpar to most lighting on the market. Out of the box AI is king. And T5 help diffuse the issues with single point LEDs.
Either way get some light over that rig and start looking at what else you can add!