http://www.research.philips.com/newscenter/archive/2006/060901-lumalive.html

"The jackets are comfortable to wear, and the Lumalive fabrics only become obvious when they light up to display vivid colored patterns, logos, short text messages or even full color animations. The electronics, batteries and LED arrays are fully integrated and invisible to the observer and wearer. The jackets feature panels of up to 200 by 200 mm², although the active sections can be scaled up to cover much larger areas such as a sofa."

If you could have an LED shirt, what would you have it say?

Mine would say "My other shirt is DKNY"