What is double line vs. single line neon?

Double-line neon follows the outside of the letter, whereas single-line neon is a single line of neon. The double line has a lot more impact, and is great for large-scale signs, or where the font needs to be replicated precisely. Single line neons work best for smaller scales, or if budget is a concern. We can send more examples if required! The image below shows both mentioned styles, BRIGHT LIGHTS is in a single line, BIG CITY, and double.