It's not likely that they display the proper angle coverage.
When I bought my boat the PO had the R/G bow lites mounted both facing forward instead of 0 to 112.5. That must have confused the crap out of other boaters.
Now I have LED nav lights up on my hardtop. The white all-around isn't quite a meter higher.
But, its at least 11 ft over the water line and unobstructed which is way better than those ridiculous gunnel mount plug-ins that blind you (when they actually work)