Acrylic signage look good and better for a longer lime compared to other signages materials. It is durable and weather resistant. It shall last longer than that of metal or wooden materials. It is always a better choice to use acrylic for exterior signage as the board will expose to weather elements all year round.
It works well with Neon or LED lighting especially for marketing purposes.
For this case as in the image, the installation was using Acrylic Spacer / Glass Spacer / Wall Mount Standoff Screw made of Stainless Steel, size 30mm long and 18 mm in diameter.