So, this was a good read...https://www.eagerled.com/new/How-to-choose-Pixel-pitch-for-Outdoor-LED-Sign.html
I would say that their claim of size in square meters determining pixel pitch (resolution) is bogus.
Resolution and viewing distance is what maters most. How far away from the image will you be at what resolution to get the most out of the image. Which, they do cover.
They suggest that with a 30m+ viewing distance that a 10mm pixel pitch (P10) is appropriate.
If you are closer than that and demand the best possible image, then P8 may be better.
From there, brightness shouldn't be an issue at either size as both are very much daytime viewable. This is the same type of technology used in Times Square NY and many other downtown locations. It's what is used at all the outdoor stadiums as well.
My personal experience with LED outdoor signage is non-existent. I've used it indoors on several occasions and then it is P1.6 or P1.2 that I have used. It's incredibly bright indoors and really not my favorite technology.
What is really lacking is the information on the technical aspects of these devices and displays. You almost always have to go directly to a manufacturer who is also often the installer and they will walk you through certain features of their product.
I think the real question is whether or not your budget allows you to get the product you want. LED video walls are expensive. The finer the resolution P8 over P10 for example, you will be paying for those extra LEDs and they will produce a finer image for when people are closer, but at 30+ meters, it doesn't sound like that extra resolution will matter.
- Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.