LED: A sign of the way things are going
Signs are hardly a new form of advertisement. Go back to a time before electricity and an affordable print media, and they were essentially the only way of spreading the message about your business beyond word of mouth. Thankfully, in the modern age, businesses have a few more options available to them. Yet that doesn't mean the sign has gone away; on the contrary, it's only improved with time, evolving to make the most of new innovations.