Visible light communications (VLC) is the transmission of information using modulated lights. The use of the visible spectrum is attractive for multiple reasons: 1) the available visible light spectrum is large and unlicensed (more than 10,000 times larger than that of the RF spectrum), 2) VLC easily allows for wavelength division multiplexing (infrared and visible) and 3) VLC can offer secure links and/or high spectrum reusability by the use of highly directional light beams.