Patent ID: 7737640

Claim:
A lighting fixture comprising: one or more first lighting elements; a first source of power, wherein said first source of power is a battery, and said battery is incorporated within or attached to said lighting fixture; a control system that includes a microcontroller, wherein the one or more first lighting elements are configured to be controlled and operably connected to the first source of power by the control system; and one or more second lighting elements having a second source of power, wherein said one or more first lighting elements receive power from the first source of power and illuminate when said control system determines that said second source of power is in an undervoltage, momentary outage or sustained outage condition; wherein the control system is configured to: determine whether said second source of power has voltage present; if said second source of power does not have voltage present, then determining whether said first source of power is connected; and if said second source of power does not have voltage present and said first source of power is not connected, then preventing operation of said one or more first lighting elements when said first source of power is connected until said second source of power has a voltage present and said second source of power experiences an undervoltage, momentary outage or sustained outage condition, then said one or more first lighting elements receive power from the first source of power and illuminate.