The thing he has going for him in his setup is the quantity of LED's for sure. I have just one row of LED's in my F-100 setup and it's not horribly noticeable in broad mid day sunlight unless you get looking at it in the right angle. Mornings and evenings are great but that limits the effectiveness of typical flights.
I suspect Joe's setup would be great and might get a set if he's still making them. Here is a "ground" demo video of my F-100 I finished last year. It's mostly a demo of the sound system but the single row "cheap" LED setup can be seen.