Patent ID: 7271543
Filing Date: 2007-09-18
Classification: H05B,Y02B

Abstract:
1. An electrically-operated method of providing illumination for a stairwell of an office building during work hours when the stairwell is nominally in use and even less frequently in use during office building work off-hours, said provided illumination being effective to minimize the consumption of power comprising the steps of: A. providing low level illumination in a stairwell during office building work hours for power conservation; B. providing high level illumination in said stairwell in substitution for said low level illumination as needed; C. operating a movement-sensing means in said stairwell for determining an individual's presence in said stairwell; D. receiving a signal from said movement-sensing means upon a determination in an operating thereof of an individual's presence in said stairwell: E. switching from said low level illumination to said high level illumination upon a received signal from said movement-sensing means; and F. using a timer-operating means for operating; said high level illumination to remain in continuous operation but only for a timed duration to correspondingly limit power consumption for said high level illumination to said timed duration; whereby an initiation of and subsequent continuous timed operation of said high level illumination minimizes power consumption within the stairwell.