The spread and par ratings that BRS tested for these light fixtures is great but their tests are not representative of a reef tank. They test flat surfaces for spread and par, but your reef tank is not flat. LEDs are cannons, or single point light sources. They do not spread light around very well and are much akin to spotlights.
The best theory with LEDs is to spam them over tour tank to insure the best coverage. Here is a comparison of a single unit versus a blanket of lights.
When LEDs first entered the scene, it was all DIY and everyone spread the LEDs out as much as possible because of the understanding of how this light source worked. We ran into a problem though. You ended up with banding, aka the disco effect. Enter Radion. They put them all on a nice PCB, tight puck because it looked good to the user, but had nothing to do with light distribution. In modern days, you see Radions mirroring the Chinese black box more than their original design, and that’s for a reason. The wider spread, spammed, and lower powered individual LEDs make for a better light source for light spread in a reef tank. The difference is now that I can buy the Chinese black boxes at $130 per unit versus $840 per radion. Black boxes are proven and I can buy 6.5 or them per a single radion and they’re proven to grow and color corals very well.