Occupancy sensing lighting control system

An occupancy sensing lighting fixture comprising:

• a light source configured to illuminate a surrounding area;
• a wireless communication unit configured for operating at least in a radio frequency communication band of 50 MHz to 6 GHz and comprising a signal-generating device configured for generating control signals detectable by a mobile cellular phone device located within the surrounding area and not being in an active call mode;
• a signal detector configured to detect communication signals generated by said mobile cellular phone device;
• an occupancy condition generating device configured to determine occupancy condition in response to a detection of said communication signals;
• and
• a load control device connected between an electrical power source and said light source and configured to control a current supplied to said light source.

A method of communicating with building occupants, comprising the steps of:

• providing an electric lighting fixture configured to illuminate a surrounding area;
• sending directional control signals from said electric lighting fixture towards said surrounding area;
• detecting a presence of a mobile cellular phone device being not in an active call mode within said surrounding area;
• changing the amount of electric power delivered to said electric lighting fixture;
• and
• triggering an audible or visual signal in response to a detection of the presence of said mobile cellular phone device.