http://www.physorg.com/news575.html
"Sharp Corporation announces the introduction into the Japanese market of... an Illuminating Solar Panel integrating long-life, energy-efficient, high-intensity LEDs (light emitting diodes) with thin-film, ''see-through'' solar cells into a single solar module..."
LN-H1W Thin-film solar module with integrated LEDs
1. Consolidates power generation, daylight transmission and illumination functions in a single module.
2. Uses Crystalline Thin-Film Tandem Cells with a conversion efficiency 1.5 times higher than previous cells*2.
3. Uses long-life, high-intensity light emitting diodes that contain no mercury.
Article also describes the solar-powered streetlight.