ATI seems to be missing target market a bit. OK this is near luxury pricing in flat routed aluminum fixture and heat sink seem well built.
BUT! The magic with ATI by luck or design was the gold standard 8 bulb 48" T5 fixture with 4 ATI Blue Plus, 2 Coral Plus, and then 2 Actinic Bulbs on channel 2. This flat out grows corals well for decades and still does if not for disappearing lamps and bulbs. This should be no mystery and BRS recommends and boards used this set up for decades.
ATI should be emulating this in a preset program for a 4 foot tank. Instead, you get vague statements from them basically saying you on your own with all the sliders and LED clusters. To that effect then I assume it is not as good as the gold standard of T5 Blue Plus arrays.
When Ecotech started dominated market and still does, they gave clear presets ie AB+ programs etc and case use studies. These will likely not be forth coming from ATI for whatever reason.