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Lighting device with multiple power sources and multiple modes of operation

DC
  • US 7,391,159 B2
  • Filed: 05/14/2007
  • Issued: 06/24/2008
  • Est. Priority Date: 03/13/2006
  • Status: Active Grant
First Claim
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1. A lighting device comprising:

  • a number of light sources mounted on a common printed circuit board (PCB);

    a controller for distributing power from a main power source and a secondary battery power source to a selective one or more of the light sources according to a first mode and second mode of operation, the first mode of operation being associated with non-emergency illumination and the second mode of operation being associated with emergency illumination;

    a battery for powering the selected one or more light sources in the second mode of operation; and

    a housing defining a common enclosure for housing the light sources, controller, and battery.

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