Brs did a par per dollar video and if i remember right, ai 16 hd we're the highest.
I run a 48" aquatic life t5/led hybrid with 2 hydra 32s on my display. On my 29 biocube frag tank I run a single hydra 32... Sure I could have done a single 16, but more power! The t5 on the main tank eliminates shadowing and I can grow in all parts of my tank. The t5 alone would hit your goals and it's less than one hydra 32. Mine goes in a hood, so appearance might be something to consider though if your going open top. I wouldn't mind it though. Could also take a look at the ap9x and photon v2. If you are open top, pick fish that don't tend to jump. Kids don't like finding dead fish on the floor, significant others either..
I haven't used radions. I am certain they work well, I just can't validate the expense.
I'm a fan of ai so far for the features and how simple the app is. I downloaded a bunch of lighting profiles and settled on the ab+ profile. Looks really nice too me.