At the General Electric Global Research laboratory in Niskayuna, N.Y. they are printing lights. OLEDs (organic light emitting diodes) are still very expensive to manufacture. The few OLED products available now are produced by a costly process called vacuum deposition. Sony sells an 11-inch OLED TV for $2,500. GE has visions of printing sheets of OLEDs to light rooms with new, diffuse light sources. Pull down your blinds and have them light up the room. In a few years sheets of OLEDs may show up in luxury settings, but there are challenges to overcome in longevity and manufacturing before you can pick up a roll of light at the store.