See the video clip that relates the history of the ubiquitous LED. Not that life would not go on without it, but it has an important place.
About Bill Gram-Reefer
Bill Gram-Reefer is the Editor & Publisher of Halfway To Concord. With 30 years experience in technology and marketing, Bill is an expert in SEO and local SEO, Content marketing, and copy writing for business, government, non-profits, and public affairs. He offers Internet marketing services via WORLDVIEW PR. See his Google+ profile.