As mentioned in American Express Open Forum

Grab a flat screen TV from your home or business and place it in your storefront. Then connect your computer to the screen and create a text-based screen saver advertising your latest sale in a bright, easy-to-read font. For added pizzazz, border your television with a few strips of tape-backed LED lights. This idea comes from Tamara Romeo, founder of San Diego Design, and is similar to what she did for a local mortgage lender client.