2004
Announcement of an “illuminating solar cells,” a combined solar cells and LED


Thin-film solar cells/ LED integrated module
Employing a crystalline thin-film tandem cell that has a high conversion efficiency, 1.5 times that of previous models

Two models were released; the "Lumiwall", an "illuminating solar cells" which is a see-through type thin-film solar cells integrated with a power-saving long-life high-luminosity LED (light-emitting diode), and a solar powered street light that combines solar cells and a high-luminosity LED, and does not require the installation of power lines.