A light fixture defines a first optical path of propagation of a beam of visible light through the interior of a receptacle between a light source and a lighting window, and a second optical path of propagation of a beam of infrared light through the interior of the receptacle to the lighting window with a view to forming a two-way Li-Fi channel for communication of data. The light fixture further includes an optical component that is spectrally selective between the visible and infrared spectra, the component being placed at an intersection of the two optical paths, and being configured to transmit the light beam propagating along one of the optical paths and to reflect the other light beam propagating along the other of the optical paths in order to combine the two, visible and infrared, light beams between the optical component and the lighting window.