Different from remote controller of television, Li-Fi uses visible light with the data modulation method that can hardly be seen with human eye. This might mean that normal LED Area Light can be used as a data access point in normal household.The Li-Fi technology is still in experimental stage, but many companies are already trying to commercialize the technology. At least one company, Velmenni in India, has already conducted actual measurement on Li-Fi technology.Except for software field, Apple has actually started research and development of optical communication product in hardware field. Early since 2013, Apple was awarded with a patent of “using image sensor for optical modulation”. The sensor in this patent can converse mode from image catching to data catching and allow for optical communication without adding other lamp hardware. Apple is considering using this special system on indoor LED Lights , however in general this patent is also an application device with high bandwidth.