I would go with the ati, the cheap fixtures and tetro fits don’t have the quality and reflectors and ballasts that will push par like the ati fixtures. I got close with an icecap ballast and cheap reflectors but with an ati maybe you can fit an or2 bar in there with it? That’s what I would do at least. I don’t like led for main lights but a good amount of blue LEDs with t5 or halide will really push the corals to look that much better ime.