Patent ID: 7772540

Claim:
A sequential lighting control system controlled by radio frequency (RF) signals, comprising: a motion sensor, a light controller and associated lights located on each level of a stairwell for detecting the presence of one or more persons in the stairwell and sequentially lighting individual levels of said stairwell when needed; wherein a first motion sensor that detects the entry of a person into a first level of a stairwell sends an RF signal to a first RF receiver in a first light controller that controls lights in that level of said stairwell, said controller activating said lights in response to said RF signal; said first light controller transmits an RF signal to light controllers on immediately adjacent levels of said stairwell, which light controllers upon receiving said signal activate lights on the immediately adjacent levels of said stairwell; said adjacent level motion sensor detects movement of one or more persons ascending or descending the stairwell and signals the respective light controller on the next adjacent level such that the controller at that level signals controllers on further adjacent levels to activate their respective lights, such that lights in the stairwell are activated in sequential manner until the one or more persons exit the stairwell.