Michigan State University research group have conceive a fully transparent solar panel that could replace ordinary windows, or even cover entire buildings. They designed perfectly clean solar cells, essentially equal to a regular glass window. In order to have a completely transparent appliance, light would have to flow unrestrained to the eye, meaning that those protons would have to go wholly through the substance. Therefore what the Michigan State team developed a transparent luminescent solar concentrator (TLSC), a device that utilize organic salts to take in wavelengths of light that are imperceptible to the human eye. The previous versions of these solar panel had a maximum efficiency of around 7% and was filling the interiors in a colored light. This first version of TLSC only has an efficiency of approximately 1%, but they concluded that once the production begins, it could reach 10%.