ive had my 6'x2'x2' sps reef under 6AI Sol blues for 1year. the growth was slightly slower than with 3x 250w radium20k, the colors were just a little less popping than with T5 array.
But the efficiency is unbeatable, I havent changed bulbs, and the rock is completely covered in SPS. I dont frag and trade, I dont believe in "LE" coral, I dont believe in "full spectrum", ive lost 2 colonies in the past year (out of 60), and I see my reef in person every 2-3 days. this works for me right now. I dont want to come off as an AI nutthugger, because I also have radions and love them. I'll try any lamp I can get my hands on. Just saying IME LEDs are satisfactory.
All the below coral under AI sol blues, pics from iPhone unprocessed.
ORA red planet and ORA purple stylo
A. formosa (wild)
stylophora pistillata (wild)
tabling A. solitaryensis 30" below the LEDs
A. microclados (wild straberry shortcake)
row of wild acro stags competing against ORA montis purple cap, green cap, spongiodes
coral 6-8" below lights