While good-quality LED signs and programmable LED signs can instantly drive foot traffic, wrong marketing measures may do more harm than good. Size of LED Signs. The size is the most common mistake people make when purchasing LED signs as they tend to buy LED signs that are too big to use indoors and too small for outdoors. A 2-inch high programmable LED sign can easily be read from 10 to 80 feet away, making it perfect for offices and lobbies. A 4-inch high programmable LED sign can be read up to 160 feet away, making it too large for offices but perfect for tradeshow booths, cafeterias, ballrooms, and factories. For outdoor use, a 6-inch programmable LED sign is highly recommended. The Use of Lowercase Letters. The bigger the letters are, the farther away passersby can read the LED sign. Lowercase letters are generally 30% smaller than capital letters, thus reducing the time that people need to read your sign. All capital letters is a must in LED signs. The Use of Colors. While ...