US Patent 10076015 Luminaire with radio module

In one aspect there is provided a luminaire (100) comprising: a light source (104) operable to emit a beam of light; and a radio module (106) operable to emit a radio beam comprising a radio signal, using a frequency band of 60 GHz; wherein the light source (104) and radio module (106) are operable to emit the light beam and radio beam so as to be substantially coincident in space. According to another aspect, there is provided a method comprising using a spatial extent of the light beam to indicate an approximate spatial extent of the radio beam, or vice versa using a spatial extent of the radio beam to indicate an approximate spatial extent of the light beam.