Human light technology used, as can be seen with the naked eye. and has a wavelength from 380-750 nm to communicate information. Use led bulbs (LED) as a signal and use a photo diode (Photodiode) to receive signals.
Is a technology that uses light that humans can not see with the naked eye. The wavelengths from 380-750 nm in data communications. Fluorescent LED (LED) as the transmitter. And a photo diode (Photodiode) of the signal.
Is a technology that uses the light that humans can be seen with the naked eye and wavelength from 380 - 750 nm in data communication. Using LED (LED) signal and use the photo diode (Photodiode) in the receiver .