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My dream reef tank is lit up primarily by Philips Coral Care Gen 2 lights, but I have added 4 Orphek OR3 60cm blue light bars to give the royal blue spectrum a bit more oomph.
I found that my use case, the included lenses on the LED's were far too narrow and created visible light beams on my sand bed.
To fix this, I opened up the fixtures, removed the optics (you could swap to something else easily!!) and bolted each unit back together. This is an instructional video on how to do it yourself.