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Why change it when it's obviously doing great? People are weird...I hope this helps,
I have an LPS dominant 12 inch x 12 inch high Cube (7gallons) with an AI Prime HD mounted 9 inches from the surface. Coincidentally, my settings are similar to yours which makes me think your light is not the problem.
My PAR levels are all within range, haven't bleached anything in 2+ years and my corals are all doing well. Just look at my Acans or the Riccordea Mushroom thats over 6 inches wide.
Here are some photos of my tank, PAR levels and settings from when I started.
I've since then upped my blues all at 70%.
So the full spectrum looks like this
70% UV
70% V
70% RY
70% B
1% G
1% DR
8% - White
Everything is doing well and some argue I could raise my intensity.
Its gotta be something else.