The ones most people buy from Sam's club [1] look a lot better than the samples he shows in the article (and look better in real life than on the Sam's Club site). I had one of these in my store, and the fake neon actually looked pretty good. And it had the handy feature of telling customers when the store was open.

http://www.samsclub.com/sams/double-stroke-open-sign-super-b...