I started a similar thread recently. It is frustrating. I do think the issue with people buying based on "coverage area" is part of the issue. I run a single Kessil A360WE over my 50g cube. I have no issues with shading because I have all zoanthids and my aquascape is designed to prevent casting shadows. If I was going to do SPS in this tank, I think two A180 would be better.
On my old 75g I ran DIY LEDs and it grew corals no problem. I could hit over 500 PAR on the sandbed at only 75%. With that build my fixture was the width of the tank so shading was never a problem either.
On my old 75g I ran DIY LEDs and it grew corals no problem. I could hit over 500 PAR on the sandbed at only 75%. With that build my fixture was the width of the tank so shading was never a problem either.