This is from an old school that no longer exists. I have no idea if it works or not.
It is metal and hard plastic. The item "BS9 Vintage Metal School Exit Sign lighted Square 10.5 L x 7.5 H" is in sale since Monday, September 24, 2018.
This item is in the category "Business & Industrial\Facility Maintenance & Safety\Safety Signs & Traffic Control\Exit Signs". The seller is "browerville" and is located in Browerville, Minnesota. This item can be shipped worldwide.